<< Trawler trivia: Isn't the term "Fast Trawler" an oxymoron? It appears in trawler ads. >> Without defending the term, I can describe our experience. Silverheels is a relatively light displacement (14,400) hard-chined "trawler" that I would best describe as a hybrid that was built before the current ad campaigns. Imagine a trawler-style hull form, with full but unballasted keel, skeg, single screw... but with a flybridge sportfish configuration topsides. Add a 4-cycle V8 220-hp Detroit Diesel turbo diesel, marinized by Johnson & Towers, and assume a clean hull. WOT is 3450 rpm. Normal high cruise is between 2800-3000 rpm, to keep the load up near recommended rev range (according to Johnson & Towers). 2800 rpm usually renders 12 kts. 3200 rpm, very occasionally to dust out the cobwebs gives almost 14 kts. I would guess this is similar to the "fast" that current builders are describing. Our normal low cruise is between 1800-2200 rpm, depending on how we feel abou the noise level on any given day... and depending on seas... 1800 rpm is about 7-8 kts, 2200 is about 9 kts. J&T recommends we do NOT run this slow all the time. FWIW, we average something like 3-5 gph for a whole season, depending. I haven't been able to do any better estimation than that, 'cause I don't hardly use enough diesel in any given run to make it worthwhile to refuel after a cruising leg at a constant known-speed. Cheers, -Chris (M/V Silverheels; West River, MD; VHF/WCS 9826)