The document, an “Operational Analysis Supporting Paper” prepared by the Defence Science and Technical Laboratory, warns that the jump jet has “considerable technical risks”. The “key issue” is that it carries far less fuel than the conventional plane, meaning it can carry fewer weapons and not fly as far. The reduced range means the jump jet can spend less time over its target than the conventional jet. For a target 300 nautical miles away from the aircraft carrier, the jump-jet can spend only 20 minutes over its target before turning back, compared with 80 minutes for the conventional jet.