In 1962 Hoare took early retirement from the Navy to become the first headmaster of Atlantic College.[3] With the help of students he conceived, designed, and built what is now the world's most widely used craft for inshore rescue, the rigid inflatable boat (RIB).[4] Hoare finally patented the design in 1973 and handed over all rights to the RNLI for the nominal fee of one pound. He did not cash the cheque.[5]
He retired from his role as Headmaster at Atlantic College in 1969, taking on the position of Provost, which he held until retiring to Ireland in 1973.[6] He died on the 26th of April, 1988, and was buried in Saint Barrahane's Church cemetery in Castletownshend, County Cork, Ireland.[7][8]