Shearwater Research SWIFT GPS Transmitter

The SWIFT GPS tank pressure wireless transmitter is Nitrox Ready and compatible^† with the current firmware release of those specific models of Shearwater Research brand dive computers that support hoseless air integration. Every Shearwater air integrated dive computer can also lock in your dive site location coordinates with the Swift GPS. Get more than the benefits of air integration when you capture your dive's entry and exit points, and add maps to your Dive Shearwater log. This includes the Shearwater Tern TX, Perdix-AI, Perdix 2, Perdix 3, Teric, Petrel 3, NERD 2 and the Peregrine TX model dive computers. The SWIFT GPS includes an active interference avoidance system that allows multiple transmitters to work together. GPS position acquisition works at the surface, not underwater; this is not an underwater position-tracking system.

When the dive log is transferred to the Dive Shearwater app, the log will display the entry and exit GPS coordinates along with your dive location on a map, ​a location name (if available), plus a world view of all your dive log locations.​ If the diver has multiple transmitters, only one of the transmitters needs to be the Swift GPS version. All Shearwater compatible computers in range of the Swift GPS, including those of your dive buddies will be able to capture the signal. You can verify this by seeing the GPS icon on your computer screen go green.

The transmitter is oxygen compatible, rated for depth up to { 650 ft | 200 m } with tank pressure accuracy of ±5% full scale, and has a user replaceable and widely available CR2 photo battery. The GPS function does drain the battery quicker so there is also a difference in battery life between the two models. The battery life is approximately 100 dive hours. The Shearwater brand dive computers will display a low battery warning that indicates the transmitter number approximately 20 hours before the transmitter battery needs to be replaced. Each transmitter has its own unique ID and up to four transmitters can be linked to compatible Shearwater model dive computers. Shearwater has determined that as many as twenty SWIFT transmitters can operate in proximity to each other without signal interference.

The transmitter screws in to a high-pressure (HP) port of the first stage regulator mounted on the tank to be monitored. The transmitter uses the 38kHz radio frequency to signal data. Shearwater specifies an approximate transmission range of { 3 ft | 1 m }. Position the transmitter on the same side of your body as the receiving dive computer. Reception depends on distance, orientation, obstructions and interference. The LED status indicator will flash green when a transmission is sent and flash red if an interfering signal is detected. During a dive you may at times move the dive computer so that is out of the signal pattern of the transmitter, resulting in a temporary interruption of the link. The link may also be interrupted if the dive computer is within { 3 ft | 0.9 m } of a running DPV or after a strobe light flashes. Pressure transmissions normally occur every 4.8 to 5.2 seconds. Reception can resume after the dive computer is reoriented, moved back into range, or interference clears, but reconnection within a fixed time is not guaranteed. For technical diving, Dive Gear Express recommends following the best practice of also including a standard analog SPG on the regulator as a backup.

In rare cases, the body of some first stage regulator designs will have hose ports oriented such there is not room to accept a wireless tank pressure transmitter without interfering with hose routing. The solution is to use a standoff adapter, or some divers prefer to use a short HP hose pigtail (do not forget the required Air Spool) in place of the standoff.

† The SWIFT and SWIFT GPS tank-pressure functions may work with specific models of Aqualung, Apeks, Aeris, Hollis, Oceanic, Sherwood and Tusa dive computers designed for PPS transmitters marked FCC ID = MH-8A. Shearwater does not guarantee operation with other brands. Confirm compatibility with the manufacturer of your dive computer before purchase. The GPS function is compatible only with supported Shearwater computers.