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STANAG 2805

STANAG 2805 fording and flotation requirements for ground vehicles

Makers of military combat and support ground vehicles, and the buyers who specify their fording, deep-fording and flotation capability.

STANAG 2805 sets NATO's fording and flotation requirements for combat and support ground vehicles. NATO has not released it publicly; this page describes it from the Czech defence standard that implements it.

Edition
5
Published
1997-10-07

NATO has not released this STANAG publicly. It is NATO UNCLASSIFIED, and organisations that need it obtain it through their national standardization authority.

What it is

STANAG 2805 is the NATO Standardization Agreement on fording and flotation requirements for combat and support ground vehicles. Edition 5 was promulgated in October 1997, under committee CNAD, AC/225 NAAG, LCGLE.

NATO has not released STANAG 2805 publicly. This page describes it from a public national implementation, the Czech defence standard ČOS 235001 (2nd edition, effective from 9 November 2017), which states that it introduces STANAG 2805 edition 5 into Czech use, and from AECTP-300, a public NATO test method document that cites the STANAG directly. A national implementation can add national requirements, so treat the Czech material below as that implementation's content, not as NATO's own text.

What the Czech implementation requires

ČOS 235001 sets general requirements for a military vehicle's ability to cross a water obstacle by fording or floating. Vehicle construction must give splash protection to at least 500 mm above the fording depth, allow a safe 23-degree water-entry slope under the vehicle's own power at low speed, and let the vehicle cross a current of at least 1.5 m/s.

For shallow fording, with minimal preparation and no special equipment, for at least 120 minutes: combat vehicles must reach 1,000 mm, support and special vehicles carrying over 2,000 kg must reach 750 mm, and those carrying up to 2,000 kg must reach 500 mm. A fully loaded vehicle must be able to stand in the water for at least 10 minutes with the engine off without affecting its restart, then drive itself clear, without damage to its components or loss of combat capability.

Deep fording, using watertight preparation or special equipment for at least 30 minutes, raises the combat-vehicle figure to 1,500 mm (or 500 mm below the turret roof) and the support-vehicle figures to 1,500 mm and 750 mm; combat capability may be partially reduced. Tanks and non-floating armoured combat vehicles must also drive fully submerged to at least 4,000 mm for at least 30 minutes, split between 15 minutes driving and 15 minutes standing with the engine running, with the crew compartment checked for watertightness beforehand, an engine restart after at least five minutes stopped, an emergency-egress mechanism operable from inside and outside, and resistance to water ingress at 0.04 MPa.

Vehicles built for flotation, especially amphibious combat vehicles, must be able to float and enter or exit the water under their own power, without additional special equipment where possible; where such equipment is needed, it must be easy to fit, remove and reuse in the field. After fording or floating, a vehicle's combat capability and reliability in further use must not be impaired.

Fording depths cited in AECTP-300

NATO's own environmental test method AECTP-300 cites STANAG 2805 directly when setting fording test severities: "The depth of fording test severities for vehicles should be the more severe of those found in the LCEP and STANAG 2805, "Fording and Flotation Requirements for Combat and Support Ground Vehicles", as applicable." It also fixes immersion duration by reference to the STANAG: "Fording durations (other than as specified in the LCEP or STANAG 2805) should be a minimum of one hour, and may be extended if justified by the anticipated lifecycle profile."

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How we help

A supplier bound by STANAG 2805 through a contract holds the obtained text through its national authority. In ComplyTrain you record the requirements that apply to you, from fording depths to flotation and watertightness, as your own requirements, give each an owner, and keep the test evidence that shows you meet them against each one.

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