Yachting Press Reviews etc
Sailboat guide figures
https://sailboat.guide/northshore/sigma-33-ood

Used Test – Sigma 33 by Jane Hyde, Sailing Today
https://www.sailingtoday.co.uk/boats/big-boat-review/used-test-sigma-33/
By Jane Hyde
Jake Frith took a 1982 one design cruiser racer for a dash around the central Solent. Would this racing thoroughbred prove too flighty for cruising duties?
The Sigma 33 was the first in a long series of offshore capable cruiser racers produced by Marine Projects from the late ’70s and was the company’s first dalliance with one design yachts, a Sigma forte later consolidated with the benchmark 38. The Sigma 33 was one of the latest must have sporty boats when the ’79 Fastnet wreaked its havoc and, like other notable designs, such as the Contessa 32, this disaster helped seal its reputation. Designer David Thomas was aboard one of the Sigma 33 prototypes in that fateful race and, despite several knockdowns, some cracking around the coachroof, a stove-in window and split washboards, the crew refused rescue from a Dutch Naval vessel and the plucky Sigma…
For air draft, I measured my mast as 13m including the light, which is the NASA LED combo, slightly shorter than the original. Then I think waterline to mast step is about 2m but I've not accurately measured it. Anyone else done this please?