Suunto D6i

Suunto D6i


Fact: every diver grows attached to their dive computer—or lacking a dive computer, their chronograph. Before buying the Suunto, I free dove with a chronograph and borrowed computers for SCUBA. After using the computer, I can’t imagine any other way.

Suunto Sporting the Suunto on my right (picture left) hand in Punta Negra, Cancún, México.

Why the Suunto D6i? Primarily because of its free diving mode and its small form factor. It needed all of the basic dive computer facilities—nitrox handling, deco stops, multi-gas, etc.—and also handle what we imagined would be its primary usage: as a free diving bottom timer and depth metre (and surface rest interval timer).

Plus, it’s supported by libdivecomputer, which forms the basis of our home-grow analysis tool divecmd.

What bothers me about the Suunto? That it has a USB connector, but doesn’t charge when connected.

Suunto Enjoying a talk with a friend in Manchones, Cancún, México.

I’m told that the Suunto is too “conservative” in terms of its decompression calculations. And in fact, it’s true. Diving with both my Shearwater Perdix AI and the Suunto D6i, I always incur more decompression time with the latter. However, what’s more significant is that the maximum operating depth is several metres more shallow than with other computers or the standard tables, and the NDL is shorter.

This affects us in practise when diving recreationally with Huck and her Suunto D6i Silver: we always need to thumb up when her computer reports NDL expiring first.