“Territorial sea” means the territorial sea adjacent to Great Britain and “within the territorial sea” includes on, over and under it.
Source: The Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 2001, UK S.I. 2013/214, 2013. Regulations
Territorial sea means territorial sea as defined by Section 2 of Part II of the United Nations Convention on the Law of the Sea.
Source: IMO Resolution MSC.255(84), Code of the International Standards and Recommended Practices for a Safety Investigation into a Marine Casualty or Marine Incident (Casualty Investigation Code), 16 May 2008, International Maritime Organization. Regulatory Guidance