SMART is credited in the book extract with a range of 350 or 400 nautical miles, inertial navigation and midcourse updates through a data link. A suggestion that it attacks contacts from a broad underwater sensing network raises a precision problem: an approximate submarine location would be insufficient after such a long flight. The argument therefore calls for additional sensors closer to the target. Helicopters and possibly rotary UAVs with dipping sonar are proposed as candidates. Aircraft-deployed sonobuoys are another possibility, although their adequacy for the required accuracy and updating is left unresolved.
Notable Point · 27:33-28:22
SMART's claimed range demands more precise forward sensors
SMART's long flight and midcourse data link make accurate sensors near the submarine central to the proposed attack system.