> Subs crash very rarely, so the software seems to be sufficient. Subs also operated for many decades without any kind of computer-assisted navigation, and tra

> Subs crash very rarely, so the software seems to be sufficient. Subs also operated for many decades without any kind of computer-assisted navigation, and training to handle the loss of such systems is routine, so your statement is pretty vacuous. The software at a minimum should allow sailors to operate as safely as they did without it, but one would assume that the entire point of software assistance is to improve safety and/or operational effectiveness.