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Boat Radios, or Why I am not an Engineer
So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? |
Boat Radios, or Why I am not an Engineer
On Oct 23, 8:29?am, HK wrote:
So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? VHF vs. Satellite phones: VHF can send a general broadcast, such as a pan pan or a mayday. Satellite phones need to know what number to dial in order to reach some boat across the harbor. One of the primary functions of the radio is to enable a boater to call for help in an emergency or respond to a call for help from another boat- removing the general broadcast aspect from communications capability defeats that function. SSB: SSB signals carry a very long way. Wouldn't the airwaves become so jammed as to be entirely unworkable in busy areas? As it is now with VHF, especially set on "low", you can be using a frequency in one location and somebody else can use the same frequency 15 or 20 miles away and you won't interfere with one another. I could be wong, but I think there are specific reasons why VHF is the preferred technology for short range transmissions in crowded areas while SSB is more popular for vessels well offshore and requiring extended range. There's no reason you couldn't put a satellite phone on your Parker and use that *instead* of a VHF for a lot of communications needs. |
Boat Radios, or Why I am not an Engineer
Chuck Gould wrote:
On Oct 23, 8:29?am, HK wrote: So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? VHF vs. Satellite phones: VHF can send a general broadcast, such as a pan pan or a mayday. Satellite phones need to know what number to dial in order to reach some boat across the harbor. One of the primary functions of the radio is to enable a boater to call for help in an emergency or respond to a call for help from another boat- removing the general broadcast aspect from communications capability defeats that function. SSB: SSB signals carry a very long way. Wouldn't the airwaves become so jammed as to be entirely unworkable in busy areas? As it is now with VHF, especially set on "low", you can be using a frequency in one location and somebody else can use the same frequency 15 or 20 miles away and you won't interfere with one another. I could be wong, but I think there are specific reasons why VHF is the preferred technology for short range transmissions in crowded areas while SSB is more popular for vessels well offshore and requiring extended range. There's no reason you couldn't put a satellite phone on your Parker and use that *instead* of a VHF for a lot of communications needs. My error. I meant to type ... NOT suggesting a move up to SSB or satellite, just for the reasons you mentioned. |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 08:52:35 -0700, Chuck Gould
wrote: SSB: SSB signals carry a very long way. Wouldn't the airwaves become so jammed as to be entirely unworkable in busy areas? Yes, that is exactly why the marine VHF band was created back in the 70s. The old HF frequencies, where SSB now lives, had become an abomination with distant stations and local traffic jumbled together. In my opinion VHF does exactly what it was supposed to do: Provide reliable, static free, local communications. For talking with shore stations, or extended chat with specific individuals, cell phones are the way to go. Offshore you've got Iridium sat phones and SSB. The key to solid VHF range and reliability is a good (usually large) antenna, and low loss coax properly installed. |
Boat Radios, or Why I am not an Engineer
"HK" wrote in message . .. So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Eisboch |
Boat Radios, or Why I am not an Engineer
Eisboch wrote:
"HK" wrote in message . .. So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Eisboch Aha! And I mis-typed above. I am not suggesting going to SSB or satellite. I like the idea of full duplex VHF. |
Boat Radios, or Why I am not an Engineer
On Oct 23, 11:52 am, Chuck Gould wrote:
On Oct 23, 8:29?am, HK wrote: So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? VHF vs. Satellite phones: VHF can send a general broadcast, such as a pan pan or a mayday. Satellite phones need to know what number to dial in order to reach some boat across the harbor. One of the primary functions of the radio is to enable a boater to call for help in an emergency or respond to a call for help from another boat- removing the general broadcast aspect from communications capability defeats that function. SSB: SSB signals carry a very long way. Wouldn't the airwaves become so jammed as to be entirely unworkable in busy areas? As it is now with VHF, especially set on "low", you can be using a frequency in one location and somebody else can use the same frequency 15 or 20 miles away and you won't interfere with one another. I could be wong, but I think there are specific reasons why VHF is the preferred technology for short range transmissions in crowded areas while SSB is more popular for vessels well offshore and requiring extended range. There's no reason you couldn't put a satellite phone on your Parker and use that *instead* of a VHF for a lot of communications needs. As Chuck said, a VHF is the way to go. When your in trouble, and need help now, sending out a distress signal on a VHF goes out to everyone. A phone call on a cell phone, may not get through if your out of range, and it's only going out to one person. A SAT phone, their are some bad dead spots with SAT phones, if your in one, and need help, your screwed. The calls are also to only one person. Calling the Coast Guard, which might be 10 miles away doesn't make much sense if their are other boaters near by that can be called for help. If you're on a phone, how do you relay information to a rescue boat or helecopter, do you know if they have a phone board? How about their phone number. SSB, they frequently do not work very well over short distances. You might be able to talk to someone 50 miles away, but have trouble reaching someone half a mile away. Their range also is better at night than during the day, and atmospheric conditions can also affect them. Then their is the cost, they run around $1500 for the radio, that probably doesn't include a coupler, another $300 or so, plus the antenna, $200 to $300 more. The shortest antenna I've ever seen for an SSB is about 17 to 18 feet long, not the sort of thing you want to mount on the runabout. And most draw a lot more power than a VHF, low battery power just always seems to be the problem or part of it, so you probably won't be able to use it anyway. A decent VHF can be had for about $150 for an average radio, antennes run from $50 for a small one to say $125 for a good 8 foot antenna. For under $300 your all set up with a VHF, that's not much to pay for your safety, top of the line is around $650. A basic SSB should run you $2000 or more, if your boat can handle it. So your talking about a SSB setup costing around 7 times as much. Remember, we're talking about a boat here, not a car. If your car catches on fire just pull over, get out, and worst case, if your in the middle of nowhere at night, you get to watch your car burn while waiting for help, maybe you get wet from the rain or cold from the wind. Now have the same thing happen to you in a boat, and it can easily cost you your life. Relying on a phone, rather than a VHF for communication, is a sure way to get yourself in trouble. |
Boat Radios, or Why I am not an Engineer
In article ,
HK wrote: So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. So just go ahead, with the LRC you are free to do so: Inmarsat-C, MF/HF with SSB and DSC. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. MF/HF generally has more static than VHF. And yes, HF will get you across thousands of kilometres. But: Why distribute chat over thousands of kilometres if not necessary? And if you want a phone, get one - eg Iridium. HTH Marc |
Boat Radios, or Why I am not an Engineer
On Oct 23, 12:17 pm, "Eisboch" wrote:
"HK" wrote in message . .. So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Eisboch There ya go! DSL for VHF! |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 12:20:37 -0400, HK wrote:
I like the idea of full duplex VHF. You can get it with commercial quality equipment (spelled mucho dinero). |
Boat Radios, or Why I am not an Engineer
wrote in message ups.com... On Oct 23, 12:17 pm, "Eisboch" wrote: "HK" wrote in message . .. So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Eisboch There ya go! DSL for VHF! DSL is a land line communication method, e.g. copper telephone lines, and coexists with voice. Nothing to with wireless. |
Boat Radios, or Why I am not an Engineer
On Oct 23, 1:38 pm, "D.Duck" wrote:
wrote in message ups.com... On Oct 23, 12:17 pm, "Eisboch" wrote: "HK" wrote in message m... So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Eisboch There ya go! DSL for VHF! DSL is a land line communication method, e.g. copper telephone lines, and coexists with voice. Nothing to with wireless.- Hide quoted text - - Show quoted text - Never mind, the humor was lost on you. |
Boat Radios, or Why I am not an Engineer
In article ,
"Eisboch" wrote: It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Digital would not necessarily be more efficient on bandwidth. And at the end of the range, digital detoriates faster than analog. Plus: The really important messages are already digital - a distress call goes out in 5 seconds, including position (connect a GPS!) and your identity (MMSI). In 10 seconds you manage to even detail what's wrong. The radio will try until you get an acknowledge. And you get an acknowledge rather quickly most of the time. US lags somewhat behind Europe, but the USCG has a project Rescue 21 getting DSC going. Read it all up under the keywords GMDSS, DSC, distress call. Another very useful addition in VHF is AIS. In order to reduce false distress calls, you have to pass either SRC (short range certificate, VHF only) or LRC (long range certificate, VHF, MF/HF) exams. Hope this gives enogh pointers. Marc -- remove bye and from mercial to get valid e-mail http://www.heusser.com |
Boat Radios, or Why I am not an Engineer
Hmmmm... Suprised that "Larry" hasn't yet jumped in on this particular thread. When it comes to communications he is one of our main squeezes... so to speak. (smile) 73 Bill (N6TGC) (Who is watching Southern California go up in flames) Anacapa Isle Marina Channel Islands Harbor Oxnard, California |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 11:29:03 -0400, HK wrote:
So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? Why would you want duplex? SSB doesn't do anything for you as it's still analog and at 162 MHz, isn't at all linear like FM. It's also more prone to static and atmospheric effects. Sat phones aren't much of a solution either. You want simple, easy to use and effective learn Morse code. :) |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 12:17:22 -0400, "Eisboch"
wrote: "HK" wrote in message ... So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. NNNOOOOOOOOO!!!!! God save us from digital everything. Give me good old analog communications any day. With tubes. :) ~~ mutter - digital - phooey ~~ |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 12:20:37 -0400, HK wrote:
Eisboch wrote: "HK" wrote in message . .. So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. Aha! And I mis-typed above. I am not suggesting going to SSB or satellite. I like the idea of full duplex VHF. It already exists, but the radios are expensive. I'd still lke to know why you think duplex is so important. |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 17:44:19 -0400, Gene Kearns
wrote: Yeah..... but nothing (that I know of) that is available in your area. Everybody: Check this link out and send them your location. The more interest generated, the more quickly they will add coverage... http://www.seasmartvhf.com/about/index.html Notice the engines on those boats? http://www.seasmartvhf.com/subscription/index.html WHOO HOO!!! |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 00:34:13 GMT, Short Wave Sportfishing
wrote: Give me good old analog communications any day. With tubes. :) Toooobs? Good grief. They *were* good on a cold winter night I guess if you didn't have a fireplace, and the bluish flickering of a slightly gassy high powered triode could be interesting. Toooobs and boats never got along very well though. |
Boat Radios, or Why I am not an Engineer
On Oct 23, 10:29 am, HK wrote:
So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? Well, I always thought these did a pretty good job. http://www.usswisconsin.org/Pictures...t%2024inc..JPG |
Boat Radios, or Why I am not an Engineer
In article ,
Gene Kearns wrote: GMDSS is taking that general direction, but makes SSB and satellite phones look inexpensive. DSC might take care of some of those concerns if anybody would use it.... (but it isn't legal ship-to-shore.) How is that? Eg in Spain the MRCC is in the middle of the land, why should you not be allowed to call it via DSC? see eg http://www.kloth.net/radio/dsc.php DSC replaced the radio watch both on VHF and MF/HF - with the exception of countries where DSC has not been fully deployed. Most unfortunately the US is lagging some 10 years behind Europe in this respect. In Great Britain for example DSC has been fully operational in 1999. Because of the automated reception, and alarming functions, GMDSS is much more likely to get you help immediately. GMDSS comprises several systems, VHF/MF/HF DSC calls are just a part of it, EPIRBs, SART, Inmarsat-C functions are other parts of it. Marc -- remove bye and from mercial to get valid e-mail http://www.heusser.com |
Boat Radios, or Why I am not an Engineer
wrote in message oups.com... Hmmmm... Suprised that "Larry" hasn't yet jumped in on this particular thread. When it comes to communications he is one of our main squeezes... so to speak. (smile) 73 Bill (N6TGC) (Who is watching Southern California go up in flames) Anacapa Isle Marina Channel Islands Harbor Oxnard, California Drove though their yesterday and spent a night in Solvang. Smoke did not really clear until Pismo Beach. |
Boat Radios, or Why I am not an Engineer
"Short Wave Sportfishing" wrote in message ... On Tue, 23 Oct 2007 17:44:19 -0400, Gene Kearns wrote: Yeah..... but nothing (that I know of) that is available in your area. Everybody: Check this link out and send them your location. The more interest generated, the more quickly they will add coverage... http://www.seasmartvhf.com/about/index.html Notice the engines on those boats? http://www.seasmartvhf.com/subscription/index.html WHOO HOO!!! why 3? Not enough power in 1 or 2, or do they require 2 spares? |
Boat Radios, or Why I am not an Engineer
"Short Wave Sportfishing" wrote in message ... On Tue, 23 Oct 2007 12:17:22 -0400, "Eisboch" wrote: It would seem that the next logical evolution for VHF communications is for it to go to a totally digital format, rather than the analog system it remains. Digital will allow more available bandwidth for each frequency, would open up the possibility of full duplex communications and would provide clearer communications. NNNOOOOOOOOO!!!!! God save us from digital everything. Give me good old analog communications any day. With tubes. :) ~~ mutter - digital - phooey ~~ I agree that some things work or sound better using old vacuum tubes and analog amps. I have a Mesa Boogie guitar amp that has a sound that no solid state amp can reproduce. However .... I was just thinking the other day about how quickly technology(particularly in the various communication areas) has evolved over the past 50, 20 and even 10 years, primarily due to the conversion to digital systems ... and I am not referring simply to computers. HD TV, HD radio (even AM), DVD, CD, cell phones, GPS, .... the list goes on and on. And, as fiberoptic lines expand and replace cable lines, the digital age will grow even more. We've come a long way since I worked on a basic digital communications system .... FSK with 8 bit teletype machines, clacking away, mechanically generating a digital code. Eisboch |
Boat Radios, or Why I am not an Engineer
"Short Wave Sportfishing" wrote in message ... I'd still lke to know why you think duplex is so important. Try talking to my wife on a semi-duplex cell phone someday and you will understand. Eisboch |
Boat Radios, or Why I am not an Engineer
"Tim" wrote in message oups.com... On Oct 23, 10:29 am, HK wrote: So, I was thinking, what with all the technological advances in communications, why are we still stuck with VHF radios on our boats? The limitations of VHF radio are obvious to all of us, so there's no need to repeat them here. And I'm suggesting a move up to SSB or satellite telephones. Surely, there is a better way to handle boat to boat or boat to shore communciations, with features like duplex, much greater range, less static. Right? Well, I always thought these did a pretty good job. http://www.usswisconsin.org/Pictures...t%2024inc..JPG Ah, yet another example of digital communications. Eisboch |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 03:21:21 -0400, "Eisboch"
wrote: "Short Wave Sportfishing" wrote in message .. . I'd still lke to know why you think duplex is so important. Try talking to my wife on a semi-duplex cell phone someday and you will understand. If Mrs. E is anything like Mrs. Wave, you aren't going to say anything anyway which proves the point. You don't need duplex. :) |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 20:50:08 -0400, Gene Kearns
wrote: On Wed, 24 Oct 2007 00:37:16 GMT, Short Wave Sportfishing penned the following well considered thoughts to the readers of rec.boats: On Tue, 23 Oct 2007 17:44:19 -0400, Gene Kearns wrote: Yeah..... but nothing (that I know of) that is available in your area. Everybody: Check this link out and send them your location. The more interest generated, the more quickly they will add coverage... http://www.seasmartvhf.com/about/index.html Notice the engines on those boats? http://www.seasmartvhf.com/subscription/index.html WHOO HOO!!! Geeze Louise...... do they have to put three engines on one boat just to make sure they get back? Jealous. |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 23:26:24 -0700, "Calif Bill"
wrote: "Short Wave Sportfishing" wrote in message .. . On Tue, 23 Oct 2007 17:44:19 -0400, Gene Kearns wrote: Yeah..... but nothing (that I know of) that is available in your area. Everybody: Check this link out and send them your location. The more interest generated, the more quickly they will add coverage... http://www.seasmartvhf.com/about/index.html Notice the engines on those boats? http://www.seasmartvhf.com/subscription/index.html WHOO HOO!!! why 3? Not enough power in 1 or 2, or do they require 2 spares? Yeah, yeah, yeah... Ha, ha... |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 20:51:43 -0400, Gene Kearns
wrote: On Wed, 24 Oct 2007 00:32:21 GMT, Short Wave Sportfishing penned the following well considered thoughts to the readers of rec.boats: Why would you want duplex? Uh? He likes to talk while the other party is talking? There is nothing wrong with simplex operation - you just need to keep your conversations to a minimum and short. This whole thing about duplex is silly - duplex doesn't give you any advantage at all and besides - technically, VHF isn't for conversation - theoritically. |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 03:19:22 -0400, "Eisboch"
wrote: I was just thinking the other day about how quickly technology(particularly in the various communication areas) has evolved over the past 50, 20 and even 10 years, primarily due to the conversion to digital systems ... and I am not referring simply to computers. HD TV, HD radio (even AM), DVD, CD, cell phones, GPS, .... the list goes on and on. And, as fiberoptic lines expand and replace cable lines, the digital age will grow even more. It's all going to come to an evil end. You heard it here first. The more digital we become, the more compressed the infrastructure which means that if there is a major event at one or two switch points, the potential for a cascade which shuts down the whole system increases. And it also means that the ability to control what one can access becomes easier. |
Boat Radios, or Why I am not an Engineer
"Short Wave Sportfishing" wrote in message ... On Tue, 23 Oct 2007 20:51:43 -0400, Gene Kearns wrote: On Wed, 24 Oct 2007 00:32:21 GMT, Short Wave Sportfishing penned the following well considered thoughts to the readers of rec.boats: Why would you want duplex? Uh? He likes to talk while the other party is talking? There is nothing wrong with simplex operation - you just need to keep your conversations to a minimum and short. This whole thing about duplex is silly - duplex doesn't give you any advantage at all and besides - technically, VHF isn't for conversation - theoritically. QRT QRT QRT Eisboch |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 06:13:10 -0400, "Eisboch"
wrote: "Short Wave Sportfishing" wrote in message .. . On Tue, 23 Oct 2007 20:51:43 -0400, Gene Kearns wrote: On Wed, 24 Oct 2007 00:32:21 GMT, Short Wave Sportfishing penned the following well considered thoughts to the readers of rec.boats: Why would you want duplex? Uh? He likes to talk while the other party is talking? There is nothing wrong with simplex operation - you just need to keep your conversations to a minimum and short. This whole thing about duplex is silly - duplex doesn't give you any advantage at all and besides - technically, VHF isn't for conversation - theoritically. QRT QRT QRT ROTFL!!! |
Boat Radios, or Why I am not an Engineer
And, as fiberoptic lines expand and replace cable lines, the digital age
will grow even more. Fiber has it's places, short runs in a boat ain't one of them. The vibrations in a boat would be problematic. Not to mention the higher costs of terminating fiber cabling. On a larger vessel it might be worth considering, but unlikely on recreational vessels. |
Boat Radios, or Why I am not an Engineer
I'd still lke to know why you think duplex is so important.
Try talking to my wife on a semi-duplex cell phone someday and you will understand. Given the crowded nature of the airwaves it would probably be BETTER to not have full-duplex. If folks feel the need to prattle on endlessly let them use cell or satellite phones... and PAY FOR IT. Stay off the VHF for that. |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 03:23:08 -0400, Eisboch penned the following well
considered thoughts to the readers of rec.boats: | |"Tim" wrote in message roups.com... | On Oct 23, 10:29 am, HK wrote: | So, I was thinking, what with all the technological advances in | communications, why are we still stuck with VHF radios on our boats? | The limitations of VHF radio are obvious to all of us, so there's no | need to repeat them here. And I'm suggesting a move up to SSB or | satellite telephones. | | Surely, there is a better way to handle boat to boat or boat to shore | communciations, with features like duplex, much greater range, less |static. | | Right? | | Well, I always thought these did a pretty good job. | | |http://www.usswisconsin.org/Pictures...t%2024inc..JPG | | |Ah, yet another example of digital communications. | |Eisboch Cool, yeah.... and duplex, too! -- Grady-White Gulfstream, out of Oak Island, NC. Homepage http://pamandgene.idleplay.net/ Rec.boats at Lee Yeaton's Bayguide http://www.thebayguide.com/rec.boats ----------------- www.Newsgroup-Binaries.com - *Completion*Retention*Speed* Access your favorite newsgroups from home or on the road ----------------- |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 12:53:18 -0400, Gene Kearns
wrote: On Wed, 24 Oct 2007 03:23:08 -0400, Eisboch penned the following well considered thoughts to the readers of rec.boats: | |"Tim" wrote in message groups.com... | On Oct 23, 10:29 am, HK wrote: | So, I was thinking, what with all the technological advances in | communications, why are we still stuck with VHF radios on our boats? | The limitations of VHF radio are obvious to all of us, so there's no | need to repeat them here. And I'm suggesting a move up to SSB or | satellite telephones. | | Surely, there is a better way to handle boat to boat or boat to shore | communciations, with features like duplex, much greater range, less |static. | | Right? | | Well, I always thought these did a pretty good job. | | |http://www.usswisconsin.org/Pictures...t%2024inc..JPG | | |Ah, yet another example of digital communications. | |Eisboch Cool, yeah.... and duplex, too! Even bettererer.... http://www.fotosearch.com/bigcomp.as.../u15737827.jpg |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 09:17:31 -0400, "Bill Kearney"
wkearney-99@hot-mail-com wrote: On a larger vessel it might be worth considering, but unlikely on recreational vessels. We already have ethernet and a few variants on recreational boats. It's only a small jump from there to fiber optic networking. Some big advantages are no connector corrosion issues and no induced noise, not to mention high bandwidth for things like multiplexing radar displays and such. |
Boat Radios, or Why I am not an Engineer
On Tue, 23 Oct 2007 23:26:24 -0700, "Calif Bill"
wrote: why 3? Not enough power in 1 or 2, or do they require 2 spares? With three engines there is a good chance of keeping the boat running on plane if there's a failure, not usually true with two engines |
Boat Radios, or Why I am not an Engineer
On Wed, 24 Oct 2007 18:24:09 -0400, Wayne.B
wrote: On Tue, 23 Oct 2007 23:26:24 -0700, "Calif Bill" wrote: why 3? Not enough power in 1 or 2, or do they require 2 spares? With three engines there is a good chance of keeping the boat running on plane if there's a failure, not usually true with two engines Not to mention that triples look WAY cool. |
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