The date when musters and enclosed space entry and rescue
drills are held, details of abandonment drills, drills of other life-saving
appliances and onboard training should be recorded in such logbook
as may be prescribed by the Administration. If a full muster, drill
or training session is not held at the appointed time, an entry should
be made in the logbook stating the circumstances and the extent of
the muster, drill or training session held.