The school, which will replace Inverkeithing High School, has been built to international energy standards.
Graeme Downie's comments came as British armed forces boarded a sanctions-busting Russian oil tanker in the English Channel.
The Scottish Fire Rescue service (SFRS) were called to the scene at the Port of Rosyth at about 03:00.
The UK investment pledge for Rosyth is expected to support plans for a direct ferry service to France.
HMS Venturer is among the fleet set to the replace the current crop of Type 23 warships.
HMS Active is the second of five type 31 frigates being built in a bid to modernise the Royal Navy.
Speculation is mounting about a potential new route between Rosyth in Fife and Dunkirk in France.
A 28-year-old man was arrested and charged with conspiracy to aid, abet and incite disorder.
Police are preparing for Bonfire Night after previous years saw disorder break out around Scotland.
