“We pass starboard to starboard …you are passing me astern, my friend.”
“no my friend, can we pass starboard to starboard ?”
“Where two power-driven vessels are crossing so as to involve risk of collision, the vessel which has the other on her own starboard side shall keep out of the way and shall, if the circumstances of the case admit, avoid crossing ahead of the other vessel.”
“Every vessel which is directed to keep out of the way of another vessel shall, so far as possible, take early and substantial action to keep well clear.”
“First, it is clear from [1] that the Assessors consider that APOLLO should have taken “early and substantial” action under Rules 15 and 16 at C-12 when APOLLO was set to pass astern of the four vessels at 0.56 nms or less – i.e. at about C-12. Indeed, “NRJ1” shows that the CPAs of three of the vessels was 0.36 nms or less. This also reflects Answer 1(a). Rules 15 and 16 are predicated upon “early” action taken by the “give way” vessel “to keep well clear” rather than “the latest time” when such action could have been taken. Second, as the Assessors point out under [1] and [2], the question was predicated upon the “latest time” when action ought to have been taken. This would not be the same as the time when action should have been taken under Rules 15 & 16. This is made clear in the second sentence of [3] where the Assessors refer to action taken “at or before C-7” to comply with Rules 15 & 16 and the reference to “the early answer”
“(a) When two power-driven vessels are meeting on reciprocal or nearly reciprocal courses so as to involve risk of collision each shall alter her course to starboard so that each shall pass on the port side of the other. (b) Such a situation shall be deemed to exist when a vessel sees the other ahead or nearly ahead and by night she would see the masthead lights of the other in a line or nearly in a line and/or both sidelights and by day the corresponding aspect of the other vessel.”