Home |
Search |
Today's Posts |
|
#1
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
If someone has unlimited electrical power, is he likely to keep his
Radar on all the time when he is far offshore? Offshore, far from anything else with a functioning radar system, what would prevent someone from detecting a sailboat before a collision. Assume clear weather. |
#2
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
wrote in message ... : If someone has unlimited electrical power, is he likely to keep his : Radar on all the time when he is far offshore? Offshore, far from : anything else with a functioning radar system, what would prevent : someone from detecting a sailboat before a collision. Assume clear : weather. Stupid question, I'm afraid. This is from the 72 COLREGS INTERNATIONAL- Steering and Sailing Rules RULE 7 Risk of Collision (a) Every vessel shall use all available means appropriate to the prevailing circumstances and conditions to determine if risk of collision exists. If there is any doubt such risk shall be deemed to exist. (b) Proper use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and radar plotting or equivalent systematic observation of detected objects. In clear language if you have operational radar it must be used when underway. I hope this helps. Wilbur Hubbard |
#3
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
On Sep 18, 7:39 pm, "Wilbur Hubbard"
wrote: wrote in message ... : If someone has unlimited electrical power, is he likely to keep his : Radar on all the time when he is far offshore? Offshore, far from : anything else with a functioning radar system, what would prevent : someone from detecting a sailboat before a collision. Assume clear : weather. Stupid question, I'm afraid. This is from the 72 COLREGS INTERNATIONAL- Steering and Sailing Rules RULE 7 Risk of Collision (a) Every vessel shall use all available means appropriate to the prevailing circumstances and conditions to determine if risk of collision exists. If there is any doubt such risk shall be deemed to exist. (b) Proper use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and radar plotting or equivalent systematic observation of detected objects. In clear language if you have operational radar it must be used when underway. I hope this helps. Wilbur Hubbard Wilbur, you are a dumbass. I asked because this did happen. The question is why it happened. Would someone far offshore turn off his radar if he had unlimited power? What would keep a radar from seeing an approaching sailboat. The sailboat had right of way but neither vessel had a lookout. The boat with radar may or may not have had it on. Weather was clear and seas were said to be 4-6'. Related question, if the person(s) on the radar equipped boat had his radar on and it gave an indication of a target on a specific bearing but every time the person looked outside he did not see anything, would he maybe think his radar was malfunctioning and ignore it I see from ads that radars have different modes for "offshore", "nearshore", "harbor". What do these modes do? |
#4
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
wrote in message ... : On Sep 18, 7:39 pm, "Wilbur Hubbard" : wrote: : wrote in message : : ... : : If someone has unlimited electrical power, is he likely to keep his : : Radar on all the time when he is far offshore? Offshore, far from : : anything else with a functioning radar system, what would prevent : : someone from detecting a sailboat before a collision. Assume clear : : weather. : : Stupid question, I'm afraid. This is from the 72 COLREGS : : INTERNATIONAL- : Steering and Sailing Rules : RULE 7 : Risk of Collision : (a) Every vessel shall use all available means appropriate to the prevailing : circumstances and conditions to determine if risk of collision exists. If : there : is any doubt such risk shall be deemed to exist. : (b) Proper use shall be made of radar equipment if fitted and operational, : including long-range scanning to obtain early warning of risk of collision : and : radar plotting or equivalent systematic observation of detected objects. : : In clear language if you have operational radar it must be used when : underway. : : I hope this helps. : : Wilbur Hubbard : : Wilbur, you are a dumbass. I asked because this did happen. The : question is why it happened. Like I explained and you failed to comprehend, it happened because there wasn't a watch posted as required by the rules. A radar watch should have been maintained because operational radar was on board. And a visual watch should have been maintained because it is understood that radar is a "supplemental" watch *in addition to* and not superceding a visual watch. : Would someone far offshore turn off his radar if he had unlimited : power? Yes, because they are ignorant of the Rules and have a total disregard for safety at sea. : What would keep a radar from seeing an approaching sailboat. The : sailboat had right of way but neither vessel had a lookout. You just answered you own question. Neither boat had a lookout. If they aren't maintaining a visual watch as required by the rules what makes you think they care enough to keep a radar watch? snip the rambling on and on with the display of ignorance of the real world of sailing. Wilbur Hubbard |
#5
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
On Sep 18, 5:33 pm, wrote:
On Sep 18, 7:39 pm, "Wilbur Hubbard" wrote: wrote in message ... : If someone has unlimited electrical power, is he likely to keep his : Radar on all the time when he is far offshore? Offshore, far from : anything else with a functioning radar system, what would prevent : someone from detecting a sailboat before a collision. Assume clear : weather. Stupid question, I'm afraid. This is from the 72 COLREGS INTERNATIONAL- Steering and Sailing Rules RULE 7 Risk of Collision (a) Every vessel shall use all available means appropriate to the prevailing circumstances and conditions to determine if risk of collision exists. If there is any doubt such risk shall be deemed to exist. (b) Proper use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and radar plotting or equivalent systematic observation of detected objects. In clear language if you have operational radar it must be used when underway. I hope this helps. Wilbur Hubbard Wilbur, you are a dumbass. I asked because this did happen. The question is why it happened. Would someone far offshore turn off his radar if he had unlimited power? What would keep a radar from seeing an approaching sailboat. The sailboat had right of way but neither vessel had a lookout. The boat with radar may or may not have had it on. Weather was clear and seas were said to be 4-6'. Related question, if the person(s) on the radar equipped boat had his radar on and it gave an indication of a target on a specific bearing but every time the person looked outside he did not see anything, would he maybe think his radar was malfunctioning and ignore it I see from ads that radars have different modes for "offshore", "nearshore", "harbor". What do these modes do? IME sail boats are hard to see from some angles due to much of the reflective bits being down in the boat. however i would ask how large the boats where? if a ship is sailing around and has his radar set correctly he ought to be able to see most boats signatures. Sea clutter can be a problem but IMO its not to difficult to tune out most clutter. you watch for the returns that are somewhat constant and use your glasses to confirm. it is not standard practice to shut down radar when out of the common sea lanes in fact on really big ships it is foolish, not only can high end radars read known ships and let you know who it is but some have a tracking system for up to 140 targets which it assigns by signal strength and repetition. I have never missed a sail boat with one of these systems (not saying it cant happen). fact of the matter is that i have seldom missed even floating logs and i can tell you that they work like a dream for pack ice (two other things that tend to get lost in the clutter.) most of the Modes the radar manufacturer's are touting are power settings, long, medium or short range. some actually change the emitter angle to give better returns at these ranges. Sounds to me that both ends of this accident have fault. there should have been watches on both boats. my 2 cents |
#6
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
Two meter troll wrote:
On Sep 18, 5:33 pm, wrote: On Sep 18, 7:39 pm, "Wilbur Hubbard" wrote: wrote in message ... : If someone has unlimited electrical power, is he likely to keep his : Radar on all the time when he is far offshore? Offshore, far from : anything else with a functioning radar system, what would prevent : someone from detecting a sailboat before a collision. Assume clear : weather. Stupid question, I'm afraid. This is from the 72 COLREGS INTERNATIONAL- Steering and Sailing Rules RULE 7 Risk of Collision (a) Every vessel shall use all available means appropriate to the prevailing circumstances and conditions to determine if risk of collision exists. If there is any doubt such risk shall be deemed to exist. (b) Proper use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and radar plotting or equivalent systematic observation of detected objects. In clear language if you have operational radar it must be used when underway. I hope this helps. Wilbur Hubbard Wilbur, you are a dumbass. I asked because this did happen. The question is why it happened. Would someone far offshore turn off his radar if he had unlimited power? What would keep a radar from seeing an approaching sailboat. The sailboat had right of way but neither vessel had a lookout. The boat with radar may or may not have had it on. Weather was clear and seas were said to be 4-6'. Related question, if the person(s) on the radar equipped boat had his radar on and it gave an indication of a target on a specific bearing but every time the person looked outside he did not see anything, would he maybe think his radar was malfunctioning and ignore it I see from ads that radars have different modes for "offshore", "nearshore", "harbor". What do these modes do? IME sail boats are hard to see from some angles due to much of the reflective bits being down in the boat. however i would ask how large the boats where? if a ship is sailing around and has his radar set correctly he ought to be able to see most boats signatures. Sea clutter can be a problem but IMO its not to difficult to tune out most clutter. you watch for the returns that are somewhat constant and use your glasses to confirm. it is not standard practice to shut down radar when out of the common sea lanes in fact on really big ships it is foolish, not only can high end radars read known ships and let you know who it is but some have a tracking system for up to 140 targets which it assigns by signal strength and repetition. I have never missed a sail boat with one of these systems (not saying it cant happen). fact of the matter is that i have seldom missed even floating logs and i can tell you that they work like a dream for pack ice (two other things that tend to get lost in the clutter.) most of the Modes the radar manufacturer's are touting are power settings, long, medium or short range. some actually change the emitter angle to give better returns at these ranges. Sounds to me that both ends of this accident have fault. there should have been watches on both boats. my 2 cents Two Meter, I thought that was a really good reply. I would add a couple of things. One is that reading a radar display is a bit of art and not all have either the skill (desire/drive) to acquire. I have seen radars malfunction and it is not always apparent. I got severely embarrassed once by missing an aircraft carrier from a C-130. I had the gain set to not see sea return and the gain drifted off even further without my knowledge. I bought a "blipper" or transponder for off shore runs. I don't have unlimited power but it is "helpful" to a shorthanded sailor to have the blipper alarm on. For those who may not know a transponder will give you an alarm and send a large signal to the ship with the radar. Thanks again. |
#7
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
hpeer wrote:
Two meter troll wrote: On Sep 18, 5:33 pm, wrote: On Sep 18, 7:39 pm, "Wilbur Hubbard" wrote: wrote in message ... : If someone has unlimited electrical power, is he likely to keep his : Radar on all the time when he is far offshore? Offshore, far from : anything else with a functioning radar system, what would prevent : someone from detecting a sailboat before a collision. Assume clear : weather. Stupid question, I'm afraid. This is from the 72 COLREGS INTERNATIONAL- Steering and Sailing Rules RULE 7 Risk of Collision (a) Every vessel shall use all available means appropriate to the prevailing circumstances and conditions to determine if risk of collision exists. If there is any doubt such risk shall be deemed to exist. (b) Proper use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and radar plotting or equivalent systematic observation of detected objects. In clear language if you have operational radar it must be used when underway. I hope this helps. Wilbur Hubbard Wilbur, you are a dumbass. I asked because this did happen. The question is why it happened. Would someone far offshore turn off his radar if he had unlimited power? What would keep a radar from seeing an approaching sailboat. The sailboat had right of way but neither vessel had a lookout. The boat with radar may or may not have had it on. Weather was clear and seas were said to be 4-6'. Related question, if the person(s) on the radar equipped boat had his radar on and it gave an indication of a target on a specific bearing but every time the person looked outside he did not see anything, would he maybe think his radar was malfunctioning and ignore it I see from ads that radars have different modes for "offshore", "nearshore", "harbor". What do these modes do? IME sail boats are hard to see from some angles due to much of the reflective bits being down in the boat. however i would ask how large the boats where? if a ship is sailing around and has his radar set correctly he ought to be able to see most boats signatures. Sea clutter can be a problem but IMO its not to difficult to tune out most clutter. you watch for the returns that are somewhat constant and use your glasses to confirm. it is not standard practice to shut down radar when out of the common sea lanes in fact on really big ships it is foolish, not only can high end radars read known ships and let you know who it is but some have a tracking system for up to 140 targets which it assigns by signal strength and repetition. I have never missed a sail boat with one of these systems (not saying it cant happen). fact of the matter is that i have seldom missed even floating logs and i can tell you that they work like a dream for pack ice (two other things that tend to get lost in the clutter.) most of the Modes the radar manufacturer's are touting are power settings, long, medium or short range. some actually change the emitter angle to give better returns at these ranges. Sounds to me that both ends of this accident have fault. there should have been watches on both boats. my 2 cents Two Meter, I thought that was a really good reply. I would add a couple of things. One is that reading a radar display is a bit of art and not all have either the skill (desire/drive) to acquire. I have seen radars malfunction and it is not always apparent. I got severely embarrassed once by missing an aircraft carrier from a C-130. I had the gain set to not see sea return and the gain drifted off even further without my knowledge. I bought a "blipper" or transponder for off shore runs. I don't have unlimited power but it is "helpful" to a shorthanded sailor to have the blipper alarm on. For those who may not know a transponder will give you an alarm and send a large signal to the ship with the radar. Thanks again. Knowing nothing about radars and transponders could you tell us what brands are there and how they function. Do they need to be attached to a radar or standalone and do they respond only to Search and Rescue radar signals? Thanks |
#8
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
In article
, Two meter troll wrote: some actually change the emitter angle to give better returns at these ranges. can you give us a Model Number of a Marine Radar that does the above? -- Bruce in alaska add path after fast to reply |
#9
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
On Sep 20, 10:05 am, Bruce in alaska wrote:
In article , Two meter troll wrote: some actually change the emitter angle to give better returns at these ranges. can you give us a Model Number of a Marine Radar that does the above? -- Bruce in alaska add path after fast to reply nope I only know that they were Sperry's and i had to go up to the dome to make sure the adjustment arms where working when i couldn't find a deck hand. My first and second mates being scared ****less of heading into the rigging (academy boys). when we un moth balled the ship in spring the sounds of my yelling for the mate to change the ranges could be heard in Greenland. I am no radar tech however Sperry kindly gave us several procedure sheets (about the size of the LA phone book) to guide us through. the same systems we had up north where in place on all the ships i was on for that company but i didn't have to mess with most of them. I do recall that we had to import the techs directly from Sperry. i was trying to look up the info you wanted but cant get onto the Sperry web site; it seems it wont load. |
#10
posted to rec.boats.cruising
|
|||
|
|||
radar offshore
On Thu, 18 Sep 2008 16:27:23 -0700 (PDT),
wrote: If someone has unlimited electrical power, is he likely to keep his Radar on all the time when he is far offshore? Yes Offshore, far from anything else with a functioning radar system, what would prevent someone from detecting a sailboat before a collision. Assume clear weather. High winds - sea clutter - failure to keep a proper radar watch or lookout. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
NL - [Den Helder] -Offshore - various pictures - file 10 of 10 Den Helder offshore-10.jpg | Tall Ship Photos | |||
NL - [Den Helder] -Offshore - various pictures - file 09 of 10 Den Helder offshore-09.jpg | Tall Ship Photos | |||
NL - [Den Helder] -Offshore - various pictures - file 08 of 10 Den Helder offshore-08.jpg | Tall Ship Photos | |||
NL - [Den Helder] -Offshore - various pictures - file 07 of 10 Den Helder offshore-07.jpg | Tall Ship Photos | |||
NL - [Den Helder] -Offshore - various pictures - file 06 of 10 Den Helder offshore-06.jpg | Tall Ship Photos |