A great resource that you might want to look at for underwater archaeology techniques has been created by NAS Tutor, Peter Holt from 3H Consulting.
Check out their techniques guide here.
The NAS provides support to a variety of organisations and causes that are aligned to the charitable objectives of the Society. This includes acting as the secretariat for the JNAPC as well as advice to campaign groups and teams engaged with nautical archaeological investigations.
This page is to act as guidance for the laws that apply in the UK and around the world. It includes information on the UNESCO Convention, Marine and Coastal Access Act , Merchant Shipping Act, Protection of Military Remains Act, as well as role of the UK Marine Antiquities Scheme. Discover more here.....
The NAS has developed a series of recording forms that may help with projects that you are undertaking. These forms can be printed on waterproof paper and mounted on survey boards for use underwater.