The Portuguese tugboat CANOPUS, 20m/ 124gt/ 10kn/ +-; 1945 completed by William Pickersgill & Sons, Sunderland, as TID 157 for MOWT - Ministry of War Transport, London; 1947 SHELL DEZOITO, Shell Company of Portugal, Lisbon; 1971 ?? CANOPUS, Socarmar, Lisbon, meanwhile rebuilt; 2001 CANOPUS...