My rules of thumb. "Know people before you need them", "Yes, if...."A long career in the Royal Navy Submarine Service with experience as a warfare officer at sea; a part of the Flag Officer Sea Training submarine cadre and also the submarine programmer. My recent role has been as one of the leads in the development and launch of the new ISMERLO DISSUB coordination website; a major revision of the key NATO submarine rescue manual; mobile team training to international submarine operating nations; as a lead trainer of the Coordinator Rescue Forces NATO course and most significantly activation for the TITAN DISSUB event and deployment to the DISSUB datum to provide direct SME support to the Indonesian armed forces at the time of the sinking of KRI NANGGALA.