The seafarers arrived in Halifax on the US-owned 395-gt Craig Trans (built 1945) on 18 December.
The Mission to Seafarers is trying to raise between $12,000 and $15,000 to help them go back to Honduras and El Salvador.
The charity said the crew had gone four weeks without pay or supplies.
Gerard Bradbury, an inspector with the International Transport Workers' Federation, showed journalists around the tug.
He
