Tisbury officials this week wrestled with whether the town should establish a district of critical planning concern (DCPC) for Vineyard Haven harbor, an area that currently has a detailed zoning plan for the shore but no controls for the water.

At a meeting Tuesday night session with the town planning board, members of the board of selectmen explained their rationale for considering a DCPC -- a Martha’s Vineyard Commission overlay planning district -- as a mechanism for regulating activities on the harbor.