Hey Dave, when I was at sea there was a strong rumour on one ship I served in that the owners would try and get a trip up The MSC for any ship due for dry dock as it cleared the wild life and foliage off the ships bottom!!! I know if you fell in (in the mid 60s) you were compulsorily hospitalised for at least 48 hours for observation and had your stomach pumped as routine (the AB on the other watch managed to take a Purler off the stern at Irlam) we were told by the hospital when we visited him.