The OOW should call the Master in any of the following circumstances:
(a) In the event of visibility dropping below 4 miles (company policy may be more or less than this figure).
(b) If traffic was causing concern effecting the safe passage of the vessel.
(c) In the event of failure of any of the ship’s navigational equipment.
(d) If failing to sight a landfall when expecting to.
(e) If sighting a landfall when it is unexpected.
(f) If soundings are shelving when unexpected.
(g) In the event that difficulty is experienced in maintaining the course.
(h) If a scheduled position is unattainable or suspect.
(i) In the event that the man management of watch keepers becomes untenable.
(j) In the event of heavy weather or on receipt of a bad weather forecast.
(k) On sighting ice, or receiving an ice warning of ice being reported on or near the vessels track.
(l) If sighting oil on the surface.
(m) On any issue of security or shipboard alert.
(n) In any other emergency, such as fire or flooding, imminent contact or contact with a submerged object.