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#1
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Pocket Pelorus
What can you use the following bow and beam bearings to find?
22-34, 25-41 , 26&1/2-45, 27-46 , 29-51 , 32-59 . All numbers are degrees off your bow. And you travel 5 miles between the bearings. Worth 5 asa points Joe MSV RedCloud |
#2
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Pocket Pelorus
Joe wrote:
What can you use the following bow and beam bearings to find? 22-34, 25-41 , 26&1/2-45, 27-46 , 29-51 , 32-59 . All numbers are degrees off your bow. And you travel 5 miles between the bearings. Something lying in a straight line which is parallel to my course - a series of coastal features or a line of marker buoys, perhaps? The line is a little shorter than my distance covered (4.5 miles). At the start of my journey, the nearest point on the line is about 9 miles away, bearing roughly 33 degrees. If my course and the line of targets were extended, my course would be 5 miles from the line. The middle pair of targets (26&1/2-45, 27-46) are very close together - 0.14 miles. -- Wally www.artbywally.com www.wally.myby.co.uk/music |
#3
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Pocket Pelorus
Wally wrote:
... about 9 miles away, bearing roughly 33 degrees. Sorry, it bears 32 degrees (off the bow). The final target bears 34 degrees after I've covered 5 miles. -- Wally www.artbywally.com www.wally.myby.co.uk/music |
#4
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Pocket Pelorus
Joe wrote: What can you use the following bow and beam bearings to find? 22-34, 25-41 , 26&1/2-45, 27-46 , 29-51 , 32-59 . All numbers are degrees off your bow. And you travel 5 miles between the bearings. Worth 5 asa points Joe MSV RedCloud These are not "bow and beam" bearings. What they are, are a set of bearings that if you mark the time of each set, the distance run between them will be the distance off when abeam. (5 mi.) These come from "Special cases" and include "bow and beam", "doubling the angle on the bow", "7 tenths rule", "7/3rd rule" |
#5
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Pocket Pelorus
otnmbrd wrote in message link.net...
Joe wrote: What can you use the following bow and beam bearings to find? 22-34, 25-41 , 26&1/2-45, 27-46 , 29-51 , 32-59 . All numbers are degrees off your bow. And you travel 5 miles between the bearings. Worth 5 asa points Joe MSV RedCloud These are not "bow and beam" bearings. Well I use bow and beam as a general term for this type of navigation. What they are, are a set of bearings that if you mark the time of each set, the distance run between them will be the distance off when abeam. (5 mi.) Very good, but why do you call them special cases. All give the same results. These come from "Special cases" and include "bow and beam", "doubling the angle on the bow", "7 tenths rule", "7/3rd rule" We often used a Pelorus to find the really good fishing spots near pipeline junctions, back in the loran days. Im in the process of painting a bearing board on my dash. And please..... your a seasoned licenced Master. Lets give the young yachtmster wannabe's a chance to answer. Im still amazed at wallys answer. Joe MSV RedCloud |
#6
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Pocket Pelorus
Joe wrote:
Im still amazed at wallys answer. May I ask why? -- Wally www.artbywally.com www.wally.myby.co.uk/music |
#7
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Pocket Pelorus
Joe wrote: otnmbrd wrote These are not "bow and beam" bearings. Well I use bow and beam as a general term for this type of navigation. I'll buy that. What they are, are a set of bearings that if you mark the time of each set, the distance run between them will be the distance off when abeam. (5 mi.) Very good, but why do you call them special cases. All give the same results. That's how I originally learned them .... as "special cases" we all needed to memorize/know for coastal navigation. When I first started sailing, their use was the "norm". These come from "Special cases" and include "bow and beam", "doubling the angle on the bow", "7 tenths rule", "7/3rd rule" We often used a Pelorus to find the really good fishing spots near pipeline junctions, back in the loran days. Im in the process of painting a bearing board on my dash. And please..... your a seasoned licenced Master. Lets give the young yachtmster wannabe's a chance to answer. LOL Actually, I find that many in the group are more current and up to date on many areas of navigation, than I am. Through lack of use, I've forgotten the details of many applications. My advantage may lie solely in the fact that frequently, something will tweak a memory, and I generally know where to look for the info and can easily relate to it, once found. Normally I leave these questions alone, but didn't appear anyone was finding the answer. otn |
#8
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Pocket Pelorus
"otnmbrd" wrote in message ink.net... Actually, I find that many in the group are more current and up to date on many areas of navigation, than I am. Correct! Regards Donal -- |
#9
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Pocket Pelorus
"otnmbrd" wrote in message ink.net... Joe wrote: What can you use the following bow and beam bearings to find? 22-34, 25-41 , 26&1/2-45, 27-46 , 29-51 , 32-59 . All numbers are degrees off your bow. And you travel 5 miles between the bearings. Worth 5 asa points Joe MSV RedCloud These are not "bow and beam" bearings. What they are, are a set of bearings that if you mark the time of each set, the distance run between them will be the distance off when abeam. (5 mi.) These come from "Special cases" and include "bow and beam", "doubling the angle on the bow", "7 tenths rule", "7/3rd rule" OMG!!! I really don't believe it! Are you saying that these are figures that are useful to people who are "mathematically challenged"? ... Like Rednecks??? Are there people out there who are too stupid to take a running fix???? Regards Donal -- |
#10
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Pocket Pelorus
Donal wrote: "otnmbrd" wrote Joe wrote: What can you use the following bow and beam bearings to find? 22-34, 25-41 , 26&1/2-45, 27-46 , 29-51 , 32-59 . All numbers are degrees off your bow. And you travel 5 miles between the bearings. Worth 5 asa points Joe MSV RedCloud These are not "bow and beam" bearings. What they are, are a set of bearings that if you mark the time of each set, the distance run between them will be the distance off when abeam. (5 mi.) These come from "Special cases" and include "bow and beam", "doubling the angle on the bow", "7 tenths rule", "7/3rd rule" OMG!!! I really don't believe it! Are you saying that these are figures that are useful to people who are "mathematically challenged"? ... Like Rednecks??? Are there people out there who are too stupid to take a running fix???? Not sure what you're grumbling about. These are "shortcuts" and means of estimating a distance you will be off when abeam of an object and are all part of and ways of, performing a running fix, with quick math solutions. They've been used by many sailors for years .... mayhaps you should try to learn to use them .... add to your knowledge base, as it were..... otn |
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