Lomas Point lies on the southern side of Port Esperance, near the scattered remains of the Katherine Sharer. The Marine Life Network guide describes a main boulder field in 10-20 m, an impressive kelp forest in about 10 m (at the time of writing), and cargo debris scattered across the reef from the 1855 explosion that destroyed the Katherine Sharer – dramatic evidence of the blast's force. The boulders form a complex reef of gaps and overhangs where wrasse, leatherjackets, morwong and rock lobster shelter, and their shaded faces carry sponges and ascidians.

The kelp forest the guide describes was probably giant kelp, which has since declined dramatically across south-east Tasmania; divers today should expect shorter brown algae, with any Macrocystis a bonus. The combination of a pleasant boulder reef with fragments of Tasmanian maritime history makes Lomas Point a good pairing with the Katherine Sharer on the same boat trip. Any debris found is part of a protected historic site and must be left in place.

Port Esperance is relatively sheltered, making this a reliable option in the far south when the outer coast is rough. Take a torch to look into the boulder gaps. A sounder helps pick out the boulder field, and a gentle survey of the area between the reef and the Katherine Sharer site gives a sense of how far debris was thrown.

Dover's services are only minutes away, making this an easy half-day outing. The far south has no dive shop, so bring filled cylinders from Hobart or Kingston, and allow for patchy mobile coverage by carrying a VHF radio and leaving a trip plan.

Dover is on the Huon Highway about 85 km (1 hour 20 minutes) south of Hobart via Huonville and Geeveston. There are boat ramps and jetties at Dover and around Port Esperance. Lomas Point is on the southern side of Port Esperance, a short boat run from Dover (about 10 minutes).

Anchor in sand off the boulder field. Dover has a store, fuel and accommodation.

The far south – Port Esperance, Southport and Recherche Bay – opens southward to the Southern Ocean. Southerly and south-westerly swell and strong southerly winds make the exposed sites unworkable and quickly reduce visibility, while northerly and light westerly winds give calm water. Sheltered bays such as Port Esperance and inner Recherche Bay remain diveable in moderate conditions.

Weather changes rapidly and fronts arrive every few days; plan around high-pressure systems in late summer and autumn and watch for south-westerly changes.

Descend onto the main boulder field at 12-15 m, look for cargo debris from the Katherine Sharer among the boulders, and rise to 10 m where kelp grew historically before ascending.

No regular operator; private boats and club expeditions. Underwater Adventures Tasmania runs occasional far-south trips (the Acteons are mentioned by Go Dive Tasmania as a kelp-diving area).