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you are right. it is a silly question.
shen, think about it. ******How******* did the radio compass get aligned? duh. shen, think about it for a minute. *Just ONE* of the issues is that a radio compass is aligned using a magnetic compass. Not exclusively, but you knew that. So we're sure (you tend towards weird associations), you do mean that the (usually, on small boats) relative bearing taken from the RDF is added or subtracted, as the case may be, to the compass heading which is corrected to magnetic bearing or to true bearing, prior to ploting? Silly me, that's a question. think about it? how many mag compasses have seen on boats that are accurate to 2*? Quite a few. Think about it more. How many helmsmen on sailboats have you seen that could hold a course to 2* over any period of time? Quite a few Think about it. the error of the mag compass reading TIMES the error of the helmsman gives the potential error UP TO THAT POINT. Already, you are waaaaaaaaaay beyond 2*. waaaaaaaaaaaaaaay beyond. You still haven't learned to use a compass for navigation, I see. Times or plus, doesn't matter. However, while following this thread it's become obvious that this is probably the best you could do. Think about the additional errors associated with just the radio compass itself and its usage. I see your reading is progressing. think about it, shen. I have. Your biggest problems revolve around the facts that you only know what you read, and have little if any understanding of the everyday "nuts and bolts". To continue to add to the list: You don't know how to steer. You don't know how to take bearings. etc. Shen |
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