Sunday, 1 November 2026
Standing Office 81 (SOVNPA 81) emblem Viet Nam NVietnam National Presiding Agency
on Countering the Proliferation of Weapons of Mass Destruction
Standing Office 81

ML9.Vessels of war (surface or underwater), special naval equipment, accessories, components and other surface vessels, as follows:

List
Wassenaar Arrangement – Munitions List – WA-LIST (25) 1
N.B. For guidance and navigation equipment, see ML11.
a. Vessels and components, as follows:
1. Vessels (surface or underwater) specially designed or modified for military use, regardless of current state of repair or operating condition, and whether or not they contain weapon delivery systems or armour, and hulls or parts of hulls for such vessels, and components therefor specially designed for military use;
Note ML9.a.1. includes vehicles specially designed or modified for the delivery of divers.
a. 2. Surface vessels, not specified in ML9.a.1., having any of the following, fixed or integrated into the vessel:
a. Automatic weapons specified in ML1., or weapons specified in ML2., ML4., ML12. or ML19., or 'mountings' or hard points for weapons having a calibre of 12.7 mm or greater;
Technical Note
For the purposes of ML9.a.2.a., 'mountings' refers to weapon mounts or structural strengthening for the purposes of installing weapons.
b. Fire control systems specified in ML5.;
c. Having all of the following:
1. 'Chemical, Biological, Radiological and Nuclear (CBRN) protection'; and
2. 'Pre-wet or wash down system' designed for decontamination purposes; or
Technical Note
For the purposes of ML9.a.2.c.2., 'pre-wet or wash down system' is a seawater spray system capable of simultaneously wetting the exterior superstructure and decks of a vessel.
a. 2. d. Active weapon countermeasure systems specified in ML4.b., ML5.c. or ML11.a. and having any of the following:
1. 'CBRN protection';
2. Hull and superstructure, specially designed to reduce the radar cross section;
3. Thermal signature reduction devices, (e.g., an exhaust gas cooling system), excluding those specially designed to increase overall power plant efficiency or to reduce the environmental impact; or
4. A degaussing system designed to reduce the magnetic signature of the whole vessel;
Technical Note
For the purposes of ML9.a.2., 'CBRN protection' is a self-contained interior space containing features such as over-pressurization, isolation of ventilation systems, limited ventilation openings with CBRN filters and limited personnel access points incorporating air-locks.
b. Engines and propulsion systems, as follows, specially designed for military use and components therefor specially designed for military use:
1. Diesel engines specially designed for submarines;
b. 2. Electric motors specially designed for submarines and having all of the following:
a. Power output of more than 0.75 MW (1,000 hp);
b. Quick reversing;
c. Liquid cooled; and
d. Totally enclosed;
3. Diesel engines having all of the following:
a. Power output of 37.3 kW (50 hp) or more; and
b. 'Non-magnetic' content in excess of 75% of total mass;
Technical Note
For the purposes of ML9.b.3., 'non-magnetic' means the relative permeability is less than 2.
4. 'Air Independent Propulsion' ('AIP') systems specially designed for submarines;
Note ML9.b.4. does not apply to nuclear power.
Technical Note
For the purposes of ML9.b.4., 'AIP' allows a submerged submarine to operate its propulsion system, without access to atmospheric oxygen, for a longer time than the batteries would have otherwise allowed.
N.B. For nuclear power propulsion equipment, see ML9.h.
c. Underwater detection devices, specially designed for military use, controls therefor and components therefor specially designed for military use;
d. Anti-submarine nets and anti-torpedo nets, specially designed for military use;
e. Not used since 2003
f. Hull penetrators and connectors, specially designed for military use, that enable interaction with equipment external to a vessel, and components therefor specially designed for military use;
Note 1 ML9.f. includes connectors for vessels which are of the single-conductor, multi-conductor, coaxial or waveguide type, and hull penetrators for vessels, both of which are capable of remaining impervious to leakage from without and of retaining required characteristics at marine depths exceeding 100 m; and fibre-optic connectors and optical hull penetrators, specially designed for "laser" beam transmission, regardless of depth.
Note 2 ML9.f. does not apply to ordinary propulsive shaft and hydrodynamic control-rod hull penetrators.
g. Silent bearings having any of the following, components therefor and equipment containing those bearings, specially designed for military use:
1. Gas or magnetic suspension;
2. Active signature controls; or
3. Vibration suppression controls;
h. Nuclear power generating equipment or propulsion equipment, specially designed for vessels specified in ML9.a. and components therefor specially designed or 'modified' for military use.
Technical Note
For the purposes of ML9.h., 'modified' means any structural, electrical, mechanical, or other change that provides a non-military item with military capabilities equivalent to an item which is specially designed for military use.
Note ML9.h. includes "nuclear reactors".