Equally at home with a sleek three-piece suit as with bulky scuba gear, dive watches are among the most eye-catching and practical timepieces a man can own. Their purpose is fairly self-explanatory — to monitor how long a diver has been underwater and how much air he has left in his tank.

Of course, not all of us are quite as adventurous in our aquatic endeavours, but this hasn’t stopped dive watches from their overwhelming popularity. Typically larger in size with a rotating bezel, these utilitarian timepieces rest on a rubber strap or metal bracelet. They must also have a water resistance of at least 100m, while the more expensive ones can take you way further south.

A quality dive watch is always an investment and an heirloom-potential piece, so we’ve scouted five seriously good looking and iconic ones for you to take the plunge with.