Strip a dive watch down to what a diver actually needs and you arrive somewhere close to the Marathon 36mm OSAR-D WW194026SS-2006. This Swiss automatic dive watch combines a black dial, a 300-meter rating and a glove-friendly bezel in a compact steel case on a stainless steel bracelet.

Underwater, the bezel is your lifeline. Marathon's is oversized, unidirectional and set with 120 clicks, so it can be turned precisely even with cold or gloved fingers, and it only rotates in the safe direction. A MaraGlo pip marks zero. The dial's large geometric indices and broad hands are also filled with MaraGlo, keeping the time readable as light fades with depth, while the screw-down crown is protected by guards against impacts on rocks or a boat ladder. A sapphire crystal tops it off.

The OSAR-D name stands for Original Search and Rescue with Date, and the lineage leads back to the SAR-D issued to Canadian SAR Techs in the early 2000s. Marathon's SAR divers were developed to Canadian Government requirements for search and rescue work. In the 36mm size, measuring 13mm thick with 18mm lugs, the watch fits neatly under a wetsuit sleeve. The date sits at 3 o'clock beneath a cyclops, and a Sellita SW200-1 automatic movement drives it all.

Dive Specifications: WW194026SS-2006

• Model: Marathon 36mm OSAR-D, black dial
• Water resistance: 300 meters / 30 ATM
• Bezel: unidirectional, 60 minutes, 120 clicks, MaraGlo pip
• Crown: screw-down with crown guards
• Case: 36mm 316L steel, 13mm thick, 43.5mm lug to lug
• Movement: Swiss Sellita SW200-1 automatic, Incabloc
• Crystal: sapphire, cyclops date at 3
• Bracelet: stainless steel, 18mm

Built for the dive log, comfortable for the commute.