Originally Posted by C2 RIBS
Reading this document OAN 678 does suggest a dry suit for all but if I recal this was for the open RIBS operating unrestricted and where we operate cat3R then suitable clothing MUST be worn which is accepted as proper waterproof for weather conditions expected.
I hope Duncan will be along shortly to discuss these coding issues.
To clarify, OAN678 was put out by MCA in 2010 in order to state how they were happy for open RIBs to operate in darkness.
The code requires a "Substantial enclosure" for all vessels operating in darkness - ie Category 3. This means a GRP wheelhouse. Prior to OAN678 operators and surveyors were requesting "equivalence" by suggesting a portable canopy / tarpaulin / etc. Some of these were quite good, some were not and it was left to the integrity of the surveyor to propose to the MCA that this be allowed.
Now we have OAN678 it's crystal clear what's allowed - look at the matrix on the final page.
For example, if you only want to operate in favourable weather, up to 3 miles from a safe haven, then you only need to wear lifejackets and provide suitable clothing along with the flares and lights over and above your category 4/5/6 coding. This is what most people want.
We've been applying OAN678 since 2010 with no problems.