The Offshore Installations (Safety Zones) (No. 2) Order 2019

Article 2 of this Order establishes, under section 22 of the Petroleum Act 1987, safety zones having a radius of 500 metres from the specified point around the 7 installations (which are subsea installations) specified in the Schedule to this Order stationed, or to be stationed, in waters to which section 21(7) of that Act applies (these include territorial waters and waters in areas designated under section 1(7) of the Continental Shelf Act 1964 (c. 29)).

Link: The Offshore Installations (Safety Zones) (No. 2) Order 2019
Source: Legislation .gov.uk

ISO 17208-2:2019 Underwater acoustics. Quantities and procedures for description and measurement of underwater sound from ships Part 2: Determination of source levels from deep water measurements

Channels (metal sections)
Cellular materials
Sandwich materials
Metal sections
Plastics

Link: ISO 17208-2:2019 Underwater acoustics. Quantities and procedures for description and measurement of underwater sound from ships Part 2: Determination of source levels from deep water measurements
Source: BSI Standards