He had been inspired to create a safer way for police to deal with situations after watching a shootout in North Hollywood, Los Angeles on television.
[6]: 243 A Mantis sub was used in the James Bond film "For Your Eyes Only",[4] which he himself piloted in a large tank at the Pinewood Studios[8] In 1981, he designed the first of the Deep Rover-series of 1- and 2-person submersibles.
Amongst the people on the bridge of Egabrag, where the UQC was installed, were the Captain and helmsman, his then wife Sylvia Earle, a reporter, cameraman and sound man from KRON-TV, a San Francisco TV station, the Operations Manager from CANDIVE and the Diving Safety Officer from the University of Rhode Island, aquanaut Phillip Sharkey.
"[16]: 139 This exploit in 1985 set the world solo dive depth record in a submersible at 1,000 m (3,300 ft), which was soon repeated by Sylvia Earle, and another team member.
To save weight, the single-person Deep Flight relied on a glass fiber-reinforced pressure vessel, impregnated with syntactic foam.
Its design influenced the Ocean Everest concept, which was intended to be a two-person submersible using a carbon fiber hull and meeting American Bureau of Shipping certification for operation to 30,000 psi (210 MPa; 2,000 atm).
[3] In 2000, he completed the DeepFlight Aviator, the first embodiment of the Deep Flight concept, namely a positively buoyant submersible that relies on hydrodynamic forces on its wings for diving.