How annual sloops prepared Britain's ocean escorts

How did Britain respond while the United States explored cheap ocean-going escorts?

It kept building successive sloop designs, using them both as operational escorts and as a continuing test program.

The Royal Navy continued building sloops while the United States argued over a cheap ocean-going escort. A new sloop design each year allowed different ideas to be tried. Continued production also put useful ships into service. In this account, that combination made the programme both a safety valve and a means of testing future escort designs.