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If you have a Smart Mooring shipped prior to July 2022, please see the legacy guide below:
Isolating and Checking Smart Mooring Sensor Modules [SM v2 and earlier - prior to July 2022]
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Often when we see data loss from one or more sensors on a Smart Mooring system it is difficult to determine exactly where the failure occurs. Use this guide to isolate and determine whether or not a Sofar temperature module is functioning correctly.
A Smart Mooring element that has failed, whether it be a yellow Smart Mooring cable, jumper, or sensor module, will usually mean you can’t get data from any modules below that element. So if the top sensor is reporting but the bottom sensor is not (in a two-sensor configuration) it could be any of the elements between them—just like a string of old Christmas lights where if one bulb goes out all the ones after it goes out.
Follow these steps to find out which element has failed.
Step 1: Prepare the Smart Mooring
Step 2: Run an Isolation Test
Option A (Longer to test each element but easier): Using the Spotter Dashboard.
Connect just the sensor module that you suspect has failed to the Spotter directly, by itself. It should look like this:

Turn on the buoy for 2 hours, somewhere outside or near a lot of windows where Spotter can see the sky and connect to GPS.