1) Bring up anchor 2) Cast off from the harbor 3) Let loose 4) Loose from anchorage 5) Release from a dock 6) Release, nautically 7) Set adrift 
• (v. i.) To weigh anchor. • (v. t.) To loose from anchorage. See Moor, v. t. • (v. t.) To cause to ride with one anchor less than before, after having been moored by two or more anchors.
to loose (a vessel) from moorings or anchorage. · to bring to the state of riding with a single anchor after being moored by two or more.