The new and improved four bearings method

[Kuikueg]

Originally Posted by makman94

...even the manuevering boards method demands some constant speeds(for our boat) and two sets of three bearings to have the results but yours...

Thanks for your comments, Makman. It's not such a big deal.

You are right about the maneouvrig board: the fact that you or your target become the center of coordinates limits somehow your maneouvres. Frequent changes of speed or course during the proccess at the very least will clutter the board so much as to make computation complex, ackward and confusing. But we have to acknowlege the need for it. In real life your own position is uncertain -without GPS, that is- and becoming the origin of coordinates simplifies the problem for that reason. Also, the scale of a real chart can be a limit to a direct method. The triangle might fall outside the chart, or be as little as to make accurate protracting of its distances imposible. There are very good reasons why navies use the maneovring board.

In the manual from the USN for the use of the MB, back in the forties, there is a case estated "given six bearings to contact establish its course, range and speed" or something like that. I have not gone through the proccess it describes, but I suspect that the doctrine for using six bearings instead of four, which would be enough, comes from the need to compensate for the uncertainty of your own position.

I would like to see a MB implemented in SH5. It really is simple, as much as including a nomograph, which is already done. We could use the real procedures manual in that case.