Do Royal Navy Type numbers still indicate a ship's primary intended role?
Short answerThey remain a useful clue. Type 26 is broadly capable, but its design features show that anti-submarine warfare is its defining mission.
NotesThe Type-number scheme described here assigns Types 11-30 to anti-submarine frigates, 31-40 to general-purpose frigates, 41-60 to anti-aircraft destroyers, and 61-80 to aircraft-direction frigates. Types 81-99 cover larger general-purpose destroyers, sloops, and frigates. Type 26 retains its anti-submarine purpose despite the broad 'Global Combat Ship' label. Rafted machinery, a quiet hull, a large towed-array sonar, and anti-submarine helicopters give that role priority in the design. Strike-length missile cells, a mission bay, and point-defence missiles widen its capabilities. Type 21 illustrates the distinction between a designated role and effectiveness in it: its number placed it in the anti-submarine group, while its suitability for that work remains questioned here.