6 ST70 Instrument User Reference ManualPower protocolPower to each individual ST70 instrument can be switched on and off using the powerbutton (as described in the ST70 Operating Guide). However, where instrumentsare part of a system, it may be more convenient to switch power for the entire systemfrom a central circuit breaker.In this case, when system power is switched ON again:• ST70 instruments that were switched on when power was last switched off willreturn to the switched ON state.• ST70 instruments that were OFF when system power was last switched OFF willremain OFF and will need to be switched ON individually using their power but-tons.1.3 Commissioning requirementAfter installation, each ST70 instrument that is NOT part of a SeaTalk ng system inwhich at least one other ST70 instrument is already set up and working must becommissioned in accordance with Chapter 2: Commissioning Procedures, before it isused for operational purposes.Note: if an instrument is part of a system in which at least one other ST70 instrument is alreadyset up and working, you do not need to commission it.Refer to the ST70 Instrument Operating Guide for instructions on how to use the ST70instrument on a day-to-day basis.WARNING: Product installation & operationEach ST70 instrument must be prepared for use in accordance with theCommissioning Procedures, before it is used for operational purposes,unless it is part of a SeaTalk ng system in which at least one other ST70instrument is already set up and working, it. Failure to comply with thiscould result in death, personal injury, damage to your boat and/or poorproduct performance.