ICS, Doc ID, STANAG Ed 6. Title, CLIMATIC CONDITIONS – AECTP Edition 1. Original Title. Category, TS. Location. AECTP (Edition 1) Leaflet /2 World-wide Ambient Air Temperature and Humidity Conditions and Levels of Direct Solar Radiation Additional Climatic. NATO AECTP CLIMATIC CONDITIONS. Amendment by NATO Publication, 05/01/ This document is an amendment. View the base document.

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Ships Manoeuvres When operating in low temperature regions ships manoeuvres e. Alert me in case of modifications on this product contact us. Wetting Precipitation, spray, drip, splash, and immersion are factors contributing to induced levels of wetting caused by dripping condensation from overhead surfaces, fire sprinklers, fractured pipes, leaking joints, cleaning operations, and exposure to splashing or immersion directly from operations in or near open waters.

While on the surface, submarine manoeuvres in the prevailing sea conditions or washing and hosing down operations can result in levels of exposure ranging from mild spray or splashing to green seas. Aextp armoured structure and temporary covers provided on military vehicles for protection against the weather and armed attack can aggravate the effects of the local meteorological 2300 such as solar radiation and damp heat, especially where logistical and operational requirements preclude the provision of appropriate levels of ventilation.

Icing Icing of storage materiel is unlikely to occur except for cold climatic zones. Low Temperature and Dew Point Icing xectp occur during any stage of materiel service life when combinations of temperature and dew point combine at critical levels.

Under certain conditions of temperature and humidity, hygroscopic materials in an enclosure may release moisture to the air and this moisture can subsequently condense on the internal surface of the enclosure causing accumulation of water.

Once temperature-stabilised, moisture penetration will be more by absorption than induced pressure differentials and by natural or forced-air circulation. The leaflets focus on the effects of the natural environment, or on the act or process by which environments experienced by materiel items are altered by environmental factors inherent in circumstantial conditions, platforms, or other materiel items that surround them.


Where internal ambient temperatures or those of individual components are of concern, they should be estimated using thermal analysis programs incorporating the severities given above and supported by specific measurements made in representative conditions.

Air Pressure Where it is required to simulate low air pressures experienced by man mounted and portable materiel when deployed beyond forward storage base, the relevant procedure of AECTP Method should be used. Data on induced temperatures should be 203 from measurements made at the intended location of materiel on the flight platform during representative worst-case conditions.

You have no items in your shopping cart. Materiel required to remain in-situ is liable to wetting when pressure-fed devices are used in cleaning and de-icing operations of the vehicle. Materiel carried in covered vehicles Temperatures in Partially and Non-conditioned Compartments In partially- and non-conditioned compartments, temperatures may be moderated by fresh air ventilation, by a supply of warm air e.


European Defence Agency – EDSTAR

Aevtp addition to the indirect effects of solar heating, the effect may be aggravated by the heat given off by installed equipment. Tactical requirements may include carrying and handling materiel over various types of terrain, negotiating obstacles, immersion in various sectp of water, and exposure to dust and sand laden atmospheres, which are likely to result in contamination and ingress of foreign substances including non-pure water.

AECTP series of leaflets are organised around classes of materiel items. Materiel carried in covered vehicles a.

However, rates of change of pressure will invariably exceed those resulting from meteorological conditions and will be determined by rates of climb and descent of the flight platform. Immersion, precipitation and spray a. During the hotter part of the diurnal cycle, especially when external surfaces, skins or compartment covers are subjected to solar radiation, equipment or components within may experience levels of damp heat in excess of the external ambient conditions.

Internal high temperatures of individual materiel will depend on similar factors to those discussed above. Thermal shock induces high rates of expansion and contraction, resulting in stress and fracture of materials, failure of bonded joints, and degraded performance of seals.

  ASTM B117-07A PDF

Covered, solar-loaded platforms can elevate interior temperature to the limit allowed by the cooling effects of ventilation induced by the speed of the vehicle when the enclosure is not air-tight. Icing of materiel in a light closed cover normally arises entirely from the prevailing meteorological conditions, with a lower probability of occurrence.

ProMIL 150 NATO Stretcher Platform

Temperatures of equipment installed in racks and instrument panels are likely to be influenced by self-dissipated heat and heat from adjacent electronic units and electrical power supplies. Materiel fitted in aircraft compartments that are pressurised during flight may be required to remain in-situ while subject to routine ground pressurisation tests to determine the integrity of seals.

Unintentional functioning of thermally activated devices. Dust and sand aect.

NATO-AECTP 230:2009

Preferably, test severities should be derived from specific measurements made at the location representative of the worst-case conditions expected in service. Low temperature Examples of the potentially damaging effects or faults caused by low temperatures are: Dust and Sand Examples of the effects of dust and sand laden atmospheres are: When simulating ground pressure testing for materiel installed in pressurised compartments, test severities for air pressures above standard ambient should be obtained from the airframe manufacturer or aircraft operator.

Immersion, precipitation and spray Solar radiation zectp the external surfaces of shelters or temporary covers during the hotter part of the diurnal cycle can sectp in enclosed materiel being subjected to a damp heat environment more severe than the external ambient conditions.

Dimensional changes and differential thermal expansion of structural and mechanical components causing: Temperatures during the deployment of fighting personnel from naval vessels such as assault ships and landing craft will be similar to the prevailing meteorological conditions at sea level, except for aaectp item which may be carried under cover, in which case the indirect effect of solar radiation may be relevant, as discussed aecfp sub-paragraph a above.

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