Sankisan Maru was 367 feet long and had a beam of 51 feet.

The Sankisan Maru was built as a cargo ship in 1920 for D.D. Todd Construction Company in Tacoma Washington, and was named the Red Hook. Between 1920 and 1942 she went through several name changes  to finally end up as the Estero in 1939 before she was captured by the Japanese  Navy in 1942 and renamed the Sankisan Maru.

The Sankisan Maru containes aircraft engines, medical supplies, several trucks, and bullets , the masts contain heavy growth of soft coral and large anemones can be found on the deck.

The top of the decks is at about 50 feet the Sankisan is a great mid week dive to give your body a rest  form the deeper diving.

Rio De Janeiro was at anchor in Truk and was hit by at least one bomb.

The Rio de Janeiro Maru was built in 1930 by the Mitsubishi Zosensho Company as a passenger ship.

Rio de Janeiro Maru was 461 feet long and had a  beam of 62 feet she was powered by 2-Mitsubishi Sulzer diesel engines and had a max speed of 17.6 knots.

In 1940 The Japanese Navy commendeared the Rio De Janeiro and converted  her to a submarine tender at the navy shipyard in Sasebo. They installed  two artillery guns, and  anti-aircraft guns.

  By 1943 the Japanese Navy submarine fleet  had all but been destoryed so the Rio de Janeiro Maru was converted to a transport.

The Rio De Janeiro is resting on her starboard side. The holds contain a large amount of empty beer bottles, and you will find the engine room a great place to explore.

Today the bow section of the Rio De Janeiro is completely collapsed on itself. The damage  apparently was caused by one of the live aboard dive operators who insists on anchoring directly to the wrecks.