1 Clinical Psychologist: Doctorate Degree in Psychology (4 to 7 years of graduate school) 2  Industrial-Organizational Psychologist: Master's Degree (2 to 3 years of graduate school)  Forensic Psychologist: Master's Degree (2 to 3 years of graduate school); a doctoral degree is recommended.
Submarine Propulsion Systems. During World War II, most American submarines were powered by diesel-electric systems. This was a departure from earlier submarine power systems, which were direct drive types, little changed from the earliest boats. In this direct-drive power system, the diesel engine is directly connected to the propeller shaft.
Print HTML. Britain's fleet of nuclear submarines is called Trident. There are four submarines (called Vanguard-class submarines), each with the capability of carrying 16 nuclear missiles. It's the missiles themselves that are actually called Trident (Trident II D-5 ballistic nuclear missiles).Each missile has the ability of delivering eight warheads. The missiles are capable of reaching targets 7,500 miles away.rident is based in the river Clyde in Scotland. The current generation of Trident submarines are coming to the end of their working lives. Construction of the first submarine of a new fleet (known as the Successor) will need to begin in 2016 to be operational by 2028, with the current fleet being phased out by 2032.