At 500 tons gross the Thesis was quite a small ship, but it is a very pretty wreck and well worth diving.
With the current flowing round the bow there are often large shoals of pollack hanging just above the wreck here. Many of the hull plates have fallen clear of the wreck, leaving a latticework of girders covered with white and yellow dead men's fingers.
Just below deck level a couple of broken ribs leave a hole big enough to fit through into the bow section. Alternatively, going round the bow to the starboard side brings you to a much larger hole into the same part of the wreck. With hull plates missing from either side the current can really whistle through this part of the wreck.
Moving aft, a broken bulkhead provides access to the forward hold with a small hatch open to the deck above. Current will still be flowing through the wreck, but here it is much easier to manage.
Further aft, the main cargo hatch can provide an easy and safe exit to the deck, but I prefer to continue inside on the starboard side of the ship where there is access alongside the boiler to the engine room. The wreck here is open above, with the remains of the engine canted to port.
Back below decks, the route along the starboard side continues to the aft holds. The hull plates aft of the boiler on the port side are still in place, but most of the plates on the starboard side are missing. Another broken bulkhead allows easy access between the holds without having to venture above deck.
Coming to the end of the holds, you have to pop out above deck and hang on in the current. At the stern the remains of the steering mechanism are still in place, a cam shaped pulley attached to the top of the rudder post.
Dipping over the down current starboard side and hitting the seabed at 33 metres, the propeller and rudder have both been removed. Presumably the rudder was cut clear to enable the propeller to be salvaged.
The return route to the bow can either be along the seabed on the sheltered side of the wreck, or along the deck in the current. With a wreck as small as the thesis and taking advantage of a dive computer there should be plenty of time to explore in more detail.
On the way back keep an eye out for pairs of bollards between the aft holds and a winch just behind the top of the engine. If you originally followed the inside of the wreck to the stern, now is your chance to view the upper parts of the engine, the top of the boiler and the remaining struts from the wheelhouse.