Four marinas are available to residents from April 15 through Nov. 15. You may sign up for the waiting list at the boating desk (203-618-7651) at the Department of Parks and Recreation. Each boat requires a Facilities Use Permit. Slip charges are based on the beam of each boat. For information on what you need to apply, visit the Parks and Recreation page on the town Web site.

The Byram Marina in Byram Park has 300 slips for smaller vessels and outwater mooring space for about 100 ships up to 36 feet of overall length with drafts up to seven feet. Call the dockmaster’s office at 203-532-9019.

The Cos Cob Marina is on River Road and has about 300 slips. For information, call 203-618-9698.

The Grass Island Marina on Shore Road has 150 slips for boats up to 22 feet in length and outwater mooring space for about 50 vessels up to 36 feet long with drafts up to five feet. Call 203-618-9695.

The Greenwich Point Marina is in Greenwich Point Park. There is outwater mooring for about 250 boats up to 36 feet long with up to seven-foot drafts. There is also rack storage for about 250 canoes, kayaks, and other small boats. Call 203-698-7792 for details.