Hi Mike, The OOW is the chief when it comes to collision avoidance as it is a time limited event. The Captain could be anywhere on the ship and so has entrusted the OOW to make decisions on his/her behalf.
Sorry but, the master of a brand new ocean liner carrying thousands of passengers and crew members, should not be anywhere else than on the
«bridge» during a pitch dark moonless night and dead calm seas, when his vessel is approaching at full pace of 22½ knots toward a known arctic field ice infested by icebergs and growlers.
Standing Orders example notes:
BASIC PRINCIPLES TO BE OBSERVED IN KEEPING A NAVIGATIONAL WATCH
The master of every ship is bound to ensure that watchkeeping arrangements are adequate for maintaining a safe navigational watch.
Watch arrangements:
(a) The
composition of the watch shall at all times be adequate and appropriate to the prevailing circumstances and conditions and shall take into account the need for maintaining a proper lookout.
(ii) weather conditions,
visibility and whether there is daylight or
darkness;
(iii)
proximity of navigational hazards which may make it necessary for the officer in charge of the watch to carry out additional navigational duties;
Navigational duties and responsibilities:
(a) The officer in charge of the watch shall:
(i)
keep his watch on the bridge which he shall in no circumstances leave until properly relieved;
(iii)
notify the master when in any doubt as to what action to take in the interest of safety;
(b) On taking over the watch the relieving officer shall satisfy himself as to the ship’s estimated or true position and confirm its intended track, course and speed and
shall note any dangers to navigation expected to be encountered during his watch.
RECOMMENDATION ON OPERATIONAL GUIDANCE FOR OFFICERS IN CHARGE OF A NAVIGATIONAL WATCH
3. It is of special importance that at all times the officer of the watch ensures that an
efficient look-out is maintained.
4. The officer of the watch should bear in mind that the engines are at his disposal and he should not hesitate to use them in case of need.
However, timely notice of intended variations of engine speed should be given where possible. He should also know the handling characteristics of his ship, including its stopping distance, and should appreciate that other ships may have different handling characteristics.
TAKING OVER THE NAVIGATIONAL WATCH
7.
The relieving officer should not take over the watch until his vision is fully adjusted to the light conditions and he has personally satisfied himself regarding:
(a)
standing orders and other special instructions of the master relating to navigation of the ship;
(c) prevailing and predicted tides, currents, weather,
visibility and the effect of these factors upon course and speed;
(d) navigational situation, including but not limited to the following:
(iv)
conditions and hazards likely to be encountered during his watch;
CALLING THE MASTER 24.
The officer of the watch should notify the master immediately in the following circumstances:
(a) if restricted visibility is encountered or expected; (darkness)
(h) if the ship meets any hazard to navigation, such as ice or derelicts; (expected)
(i) in any other emergency or
situation in which he is in any doubt.
Despite the requirement to notify the master immediately in the foregoing circumstances
, the officer of the watch should in addition not hesitate to take immediate action for the safety of the ship, where circumstances so require.