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Geoffrey Kolbe wrote:

> I am a little confused. George says that the target ship is overtaking the
> "own" ship, Peter thinks that the target ship is the one being overtaken.
> But the relative bearing is constant at 322 degrees, so (as George says)
> the two ships are in fact on collision courses. In this context, what does
> "overtaking" mean, as neither ship is "pulling ahead" of the other?

The relative bearing of "own ship" from "target ship" is 137 [reciprocal
of the relative bearing from "own ship", less the 5 degrees difference
in headings], meaning that "own ship" is more than two points abaft the
beam of "target ship". Under the Collision Regulations, "own ship" is
therefore the overtaking vessel and (assuming that they are within sight
of each other and not operating by radar alone in thick fog) is obliged
to keep clear.


Trevor Kenchington


--
Trevor J. Kenchington PhD                         Gadus@iStar.ca
Gadus Associates,                                 Office(902) 889-9250
R.R.#1, Musquodoboit Harbour,                     Fax   (902) 889-9251
Nova Scotia  B0J 2L0, CANADA                      Home  (902) 889-3555

                    Science Serving the Fisheries
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