The I-class comparison goes beyond its ten torpedoes in two quintuple launchers against Amazon's six. Four 4.7-inch guns remained, with a depth-charge rack, two throwers, and 20 depth charges adding anti-submarine capability. Full ASDIC equipment supplied another addition. The quoted range is 5,530 nautical miles at 15 knots, compared with 3,400 for Amazon at the same speed. Some ships could also be fitted for minelaying and carry 60 mines. Together these capabilities explain the scepticism about claims for only a very small rise in standard displacement.
Notable Point · 1:07:34-1:09:34
I-class destroyers add endurance and supporting weapons
Ten torpedoes accompanied greater quoted range, ASDIC, depth charges, and provision for minelaying, making the I-class comparison broader than launcher counts.