SHIPPING OUT -- Two recent visitors yesterday weighed anchor and left Bermuda waters under grey skies for trans-Atlantic crossings. Holland-America's 219-metre cruise liner Maasdam spent the day in Hamilton Harbour while on her way from Florida to Lisbon. The 164-foot German private training vessel Thor Heyderdahl , a triple masted schooner, sailed out of St. George's Harbour, in view of the Danish-registered schooner Saga . She is returning to her home port of Kiel, Germany.