The Immersion Prowler. It’s a digital data logger, dive computer, and full-featured watch, all in a 200m (660ft) water-resistant housing.
Stainless steel case with rubber side guards. Integrated rubber strap with machined buckle and clever strap retainer. It’s also long enough to easily go over a 1cm wetsuit. Swiss-made depth sensor. Dive mode which starts automatically by the pressure sensor on the left side (more on this below). In dive mode, it logs the min and max depths for each dive.
There’s a wide spectrum of dive computers/watches, ranging from minimal to full-blown computers with bitmapped displays and USB interfaces (like the Suunto D9). The Prowler sits squarely the middle in that a lot of info is logged, but it doesn’t have the USB interface or onscreen plots of things like depth vs time. Which you prefer probably depends on how you dive, and how often. And, as previously mentioned, the Immersion Prowler is primarily recommended for freediving. The dive mode is triggered automatically by two sensors hidden under the left rubber bumper. There’s a conductive water sensor, and the Intersema pressure sensor. Once the water sensor activates, the watch waits for 1.15atm of pressure, and then starts dive mode. Very cool! So how is it to wear on dry land? I found it to be pretty comfortable with one minor caveat: it’s a large watch, about 50mm at the widest point, but low-to-medium weight (120g) due to the use of rubber on the strap. The contoured strap is comfortable and keeps the watch in place on the wrist without shifting around, and the general look is that of a sports/fitness/outdoors watch, not too different from a Pathfinder or perhaps a G-shock.