Why future torpedoes may emphasize loiter time

What capability will the next generation of torpedoes emphasize?

Longer loiter time is suggested as the next priority, following earlier competition over torpedo speed.

Longer loiter time is suggested as a priority for next-generation torpedoes. Earlier British-Russian development is described as a competition to make the fastest torpedo. That focus on speed is treated as a useful development path, with future work expected to place more emphasis on endurance.