Hamilton Watch Khaki Navy Scuba H82305931. Less rugged than the tough model that inspired it, and as perfectly suited to summer days at sea as it is to a day at the office, the sturdy Khaki Navy Scuba offers faultless precision in a range of three colorful, fun variations. Emulating the triangular hour markers of its stylish predecessor, each combines a fun and youthful diving appearance. Solid hour markers stand out on a crisp black dial, ensuring easy reading and contributing to the powerful, look of this must have summer timepiece.