ACR OLAS Exposure Series Guardian Extension Cable SetOLAS Exposure Series Guardian Extension Cable Set The Guardian Extension Cable Set can extend the distance by 750mm 29. 5 inches for either the power cable, the switch cable, or both. This is designed for use on larger vessels where the Guardian hub needs to be located further from either the control switch or the power and kill switch connections. Product : ACR OLAS EXPOSURE SERIES GUARDIAN EXT CABLE Manufacturer : ACR Electronics Manufacturer Part