The small vessel on the stamp is the MICMAC built in 1968 by Heissler, Nova Scotia.
Dim. 38 x 11 x 3ft. (draught).
Powered by a 100hp Perkins diesel given her a speed of 12 knots.
She is used by the Bermuda Biological Station around the reefs and in the shallow waters off Bermuda.
2009 Can not find if she is still in service by the Bermuda Biological Station..
Bermuda 1976 17c sg358, scott334. (she is the smaller ship on the stamp, the larger is the PANULIRUS II.)
Source: Watercraft Philately Vol. 1979 page 37.