How many chains are required for a hot seat evolution afloat?

In a hot seat evolution afloat, it is required to use six chains. This procedure is critical for securing equipment and personnel safely during operations on the flight deck of an aircraft carrier, where conditions can be dynamic and hazardous. The use of six chains provides adequate stability and security to ensure that the aircraft remains firmly in position while the crew performs their tasks. Having the right number of chains is crucial in preventing accidents and maintaining safety protocols during flight operations. The other options do not meet the necessary safety standards established for such evolutions.