The Seamaster Planet Ocean 217.30.42.21.01.001 reflects the direction OMEGA has taken with its modern dive watches. This 42 mm model is built in polished and brushed stainless steel and paired with a polished black ceramic bezel ring featuring a white enamel diving scale. The inner bezel ring is produced from polished grade 5 titanium, which enhances contrast and durability.

The matte black dial features rhodium plated hands and applied indexes filled with white Super LumiNova for reliable low light visibility. Four rhodium plated Arabic numerals sit at the cardinal points, keeping the layout clear and functional. All dial text is transferred in white to maintain the clean presentation.

Inside the watch is the OMEGA Calibre 8912, a Co Axial Master Chronometer movement with a 60 hour power reserve and METAS certification for accuracy and magnetic resistance. The stainless steel bracelet has polished and brushed finishing and uses the rack and pusher extension system with an additional diver extension.

A screw in caseback made from polished and brushed grade 5 titanium displays the engraved OMEGA seahorse emblem. The watch offers a water resistance rating of 600 meters, supported by a thickness of 13.79 mm, a 47.50 mm lug to lug measurement, and a 21 mm lug width.