Doing an offshore race – OSR Category 1 requirements

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June 12, 2017 at 09:54 #26085

Ollie Holden


I was idly contemplating potential next adventures for “Nutmeg”, and chanced upon the AZAB 2019 race. This really appeals to me for various reasons, and I think would be great fun to do in a Nic 38. However, the rules require ISAF Offshore Special Regulations Cat 1, which make a number of stipulations. Purpose of this post is to see if anyone else has ever had to meet offshore regulations, and if so, can help out with any info?

There are three specifics that concern me:
1. Stability – has anyone ever had the stability measured or calculated?

2. Scantlings – given the age of the boat, I dont have any certification on hull construction. Do we know if the hulls were laid up to a specific construction standard?

3. Cockpit – the cockpit sole must be at least 2% LWL above the waterline – by my simple calculations this would mean about 20 cm, vs the 2-5cm that I think the Nic38 has – has anyone ever tried to raise the sole, or get around this in any other way?

Many thanks in advance for your help.

Ollie Holden
“Nutmeg of Shoreham”

June 12, 2017 at 18:40 #26086

Hi Ollie – here some info that may help re: Q.2

The original sales brochure, which you can find on our site here, says in the specifications section:

Glassfibre hull to Lloyds 100A specification

Our hull #126 shows its Lloyds number on a plate that Halmatic mounted inside the transom. This plate is viewable from the aft deck locker.

Marilyn, moderator

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