For the purpose of these Rules, except where the context
otherwise requires:
(a) The word “vessel” includes every
description of water craft, including non-displacement craft, WIG
craft and seaplanes, used or capable of being used as a means of transportation
on water.
(b) The term “power-driven vessel”
means any vessel propelled by machinery.
(c) The term “sailing vessel” means
any vessel under sail provided that propelling machinery, if fitted,
is not being used.
(d) The term “vessel engaged in fishing”
means any vessel fishing with nets, lines, trawls or other fishing
apparatus which restrict manoeuvrability, but does not include a vessel
fishing with trolling lines or other fishing apparatus which do not
restrict manoeuvrability.
(e) The word “seaplane” includes any
aircraft designed to manoeuvre on the water.
(f) The term “vessel not under command”
means a vessel which through some exceptional circumstance is unable
to manoeuvre as required by these Rules and is therefore unable to
keep out of the way of another vessel.
(g) The term “vessel restricted in her ability
to manoeuvre” means a vessel which from the nature of her work
is restricted in her ability to manoeuvre as required by these Rules
and is therefore unable to keep out of the way of another vessel.
The term “vessels restricted in their ability to manoeuvre”
shall include but not be limited to:
-
(i) a vessel engaged in laying, servicing or picking
up a navigation mark, submarine cable or pipeline;
-
(ii) a vessel engaged in dredging, surveying or
underwater operations;
-
(iii) a vessel engaged in replenishment or transferring
persons, provisions or cargo while underway;
-
(iv) a vessel engaged in the launching or recovery
of aircraft;
-
(v) a vessel engaged in mine clearance operations;
-
(vi) a vessel engaged in a towing operation such
as severely restricts the towing vessel and her tow in their ability
to deviate from their course.
(h) The term “vessel constrained by her
draught” means a power-driven vessel which, because of her draught
in relation to the available depth and width of navigable water, is
severely restricted in her ability to deviate from the course she
is following.
(i) The word “underway” means that
a vessel is not at anchor, or made fast to the shore, or aground.
(j) The words “length” and “breadth”
of a vessel mean her length overall and greatest breadth.
(k) Vessels shall be deemed to be in sight of
one another only when one can be observed visually from the other.
(l) The term “restricted visibility”
means any condition in which visibility is restricted by fog, mist,
falling snow, heavy rainstorms, sandstorms or any other similar causes.
(m) The term “Wing-In-Ground (WIG) craft”
means a multimodal craft which, in its main operational mode, flies
in close proximity to the surface by utilizing surface-effect action.