If restricted visibility is encountered or expected. | |
If traffic conditions or movements of other ships are causing concern. | |
If difficulty is experienced in maintaining course. | |
On failure to sight land, a navigation mark or obtain soundings by the expected time. | |
If, unexpectedly, land or a navigation mark is sighted or change in sounding occurs. | |
On the breakdown of the engines, steering gear, or any essential navigational equipment. | |
In heavy weather, if in any doubt about the possibility of weather damage. | |
If the ship meets any hazard to navigation, such as ice or derelicts. | |
In any other emergency or situation in which the OOW is in any doubt. |