A public launching ramp is available at Willis Wharf and a marine railway can handle craft up to 60 feet.
A state-owned boat harbor is just below Willis Wharf on the west side of Parting Creek. An area with about 41 slips available for commercial fishing boats. The harbor has electricity, water and a launching ramp.
The Great Machipongo Inlet leads between Hog Island and Cobb Island to Great Machipongo Channel. Shoals on either side of the entrance are marked by breakers at all times; the bar breaks only in heavy weather. The inlet is marked by buoys that are shifted in position with changing channel conditions.
The Great Machipongo Channel extends northwestward through Hog Island Bay from the inlet to the mainland where it continues as Machipongo River.
Willis Wharf on the west bank of Parting Creek 1 mile above the junction with Machipongo River, is a base for shellfish and fishing boats.