FAQ ABOUT DIVE COMPUTERS

Products - Computers

FAQ ABOUT DIVE COMPUTERS

Garmin offers the Descent Mk1 multi-activity smartwatch and dive computer in both a silver/black color (aka "Stainless") version and a gray/blue color (aka "Titanium") version. The silver/black Mk1 version has a stainless steel bezel with black accents and the gray/blue Mk1 version has a titanium bezel with blue accents. All models include the black silicone QuickFit wrist strap set, and some configurations also include a metal link QuickFit "bracelet" style wristband.

They differ in price, leading some to wonder if there is any difference in features or functionality. The body of the device on both versions is the same fiber-reinforced polymer with stainless steel buttons and sapphire crystal lens, yielding the same depth rating. Both versions of the Mk1 have the same electronics with Bluetooth Smart, Wi-Fi and ANT+ connectivity and the same firmware, thus having the same features and functionality.

The Shearwater Research Perdix dive computer model with the AI designation has a radio frequency receiver built-in to the electronics but the two models are otherwise identical. The built-in RF receiver allows the AI version to support optional RF transmitters to display the cylinder gas pressure without the use of hoses. The Perdix model without the AI designation cannot be later upgraded to support tank pressure transmitters. The difference in price of the Perdix and Perdix AI is because the AI model includes a receiver, not because the base package includes a transmitter.

Yes. Although Shearwater Teric package includes their charging stand, the Teric can also be charged by the flat mats that support the Qi wireless-charging standard. Shearwater reports good results with the inexpensive CHOETECH Wireless Charging Pad. For a portable charging solution, plug the wireless charger into a USB power bank like the ANKER PowerCore. The typical 10000mAh power bank should give enough full charges to yield around 200 hours of dive time.

Misaligned or mismatched charging antennas can generate too much heat and the charging process will be interrupted to prevent damage. If the Teric displays a high temperature warning while charging, check the position of Teric on the charger and resume charging once the temperature drops. If the problem continues it may help to change the "Quick Charge" setting in the Teric to disabled.

Shearwater Research tells us that as long as the transmitter is marked with "FCC ID MH8A" on the body then the transmitter, regardless of the brand, will also work with their Perdix AI, Teric, and NERD 2 model air integrated dive computers. However, no other Shearwater dive computer models, including the Perdix model without the "AI" designation and the original NERD, supports integration with a pressure transmitter.

The first stage regulator tank-pressure wireless transmitter supplied by Shearwater Research is actually manufactured by Pelagic Pressure Systems. Pelagic has been supplying those same OEM transmitters to various dive computer manufacturers such as Aeris, Aqualung, Hollis, and Oceanic for many years.

The short answer is you do NOT need the VPM upgrade. The Varying Permeability Model (VPM) is a bubble model based decompression theory that is available on some older models of Shearwater dive computers as an optional alternative to the default Bühlmann GF gas content model used by all Shearwater dive computers (and most other dive computers) to compute no-decompression limits and decompression schedules for dives. There is no expert consensus that VPM is better than Bühlmann, and some recent studies suggest VPM may be worse. If you don't understand the differences and why you would choose one or the other, Dive Gear Express and Shearwater recommends sticking with the factory default of Bühlmann 30/70.




     
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