Night time. Another uneventful watch on a long trip. The Navigator paces the bridge, while he thinks about home and looks forward to a shower and a good sleep.
Visibility has been poor all night, only about 2 miles due to a thick bank of fog, and the Navigator suddenly realises the fog has closed right in and he can only just make out the for'ard mast.
Going over to the radar he sees it has been left on the 4 mile range. Switching to 12 mile range he sees a target closing at 5 miles.
There is a full range of GMDSS equipment on board.
Does he send a DSC Alert? If so should it be ...