The M/V Nantucket was working the Vineyard route when tidal and wind conditions caused the ferry to hit a concrete piling at the Oak Bluffs dock on Seaview avenue Monday.

The Steamship Authority's M/V Nantucket was back out of service on Wednesday and Thursday due to a nagging mechanical problem that first arose last weekend.

A mechanical failure aboard the Steamship Authority's M/V Nantucket Saturday morning led to travel delays and confusion on both sides of Vineyard Sound.