Submersible inspection device and redundant wireless communication with a base station

An apparatus comprising:

• a remotely operated submersible having:
• a first signal receiver structured to receive a first control transmission through a liquid environment from a remote control station, the first control transmission including a command and a heartbeat;
• a second signal receiver structured to receive a second control transmission through the liquid environment from the remote control station, the second control transmission including a command and a heartbeat;
• a third control receiver structured to receive a third control transmission through a liquid environment from the remote control station;
• and
• a controller structured to use the command from the first signal receiver or the command from the second signal receiver to manipulate a system of the remotely operated submersible, the controller having a control circuit structured to use the command from the first signal receiver upon receipt of the heartbeat from the first control transmission and use the command from the second signal receiver upon receipt of the heartbeat from the second control transmission when the heartbeat from the first control transmission is no longer received,
• wherein the third control receiver is a spread spectrum radio, and
• wherein the spread spectrum radio is a firmware only radio, and wherein the remotely operated submersible is configured to concurrently monitor the first control receiver, second control receiver, and the third control receiver.

A method comprising:

• propelling, by operating one or more motors of a remotely operated submersible, the remotely operated submersible about a liquid coolant contained within an interior of a mechanical housing;
• receiving, through the mechanical housing and the liquid coolant, a plurality of signals by the remotely operated submersible, the plurality of signals each including at least a command;
• determining if at least one of the plurality of signals includes a detectable heartbeat;
• using the command of the plurality of signals determined to have the detectable heartbeat to effectuate an action of the remotely operated submersible within the liquid coolant;
• and
• transmitting, from the remotely operated submersible and through the liquid coolant and the mechanical housing, one or more signals indicating a condition of one or more mechanical structures housed within the mechanical housing.