COLREG 72 #3

Rule 18. Responsibilities between vessels

Except where Rules 9, 10 and 13 otherwise require.
(a) A power-driven vessel underway shall keep out of
the way of:
(i) a vessel not under command;
(i) a vessel restricted in her ability to manoeuvre;
(ii) a vessel engaged in fishing;
(iv) a sailing vessel
(b) A sailing vessel underway shall keep out of the
way of:
(i) a vessel not under command
(ii) a vessel restricted in her ability to manoeuvre;
ii) a vessel engaged in fishing.
(c) A vessel engaged in fishing when underway shall,
so far as possible, keep out of the way of:
(i) a vessel not under command;
(ii) a vessel restricted in her ability to manoeuvre
(d)
(i) Any vessel other than a vessel not under command
or a vessel restricted in her ability to manoeuvre shall,
if the circumstances of the case admit, avoid
impeding the safe passage of a vessel constrained by
her draught, exhibiting the signals in Rule 28.
(i) A vessel constrained by her draught shall navigate
with particular caution having full regard to her special
condition.
(e) A seaplane on the water shall, in general, keep well
clear of all vessels and avoid impeding their
navigation. In circumstances, however, where risk of
collision exists, she shall comply with the Rules of this
part.
(f)
(i) A WIG craft, when taking off, landing and in flight
near the surface, shall keep well clear of all other
vessels and avoid impeding their navigation,
(i) A WIG craft operating on the water surface shall
comply with the Rules of this Part as a power-driven
vessel.