MCTP 12-10A governs Marine Corps operations, planning, and sustainment in mountainous, snow, and cold-weather environments.
View MCTP 12-10A on armypubs.army.mil
It covers mountain terrain, weather, offensive and defensive operations, intelligence, mobility, engineering, logistics, medical support, aviation, and training. It identifies skills Marines need for mountainous, snow, or cold-weather environments and references Department of Defense mountain warfare training programs.
Applies to: Marine Corps Tactical Publication (MCTP) 12-10A, Mountain Warfare, is a reference for all unit commanders and their staffs (trained or untrained in mountain warfare) and all leaders from the company level through regiment or brigade for use in operations in mountainous terrain, snow, or cold weather.
Commanders and planners are warned that operations below -40 °F are extremely hazardous. (paragraph 3)
Units must be extensively trained before undertaking an operation in these temperature extremes. (paragraph 3)
Ideally, sites should be located on the military crest of the reverse slope with observation posts on the military crest of the forward slope and surrounding key terrain. (paragraph 3)
The increased stress on vehicle parts and adverse effects of cold weather can force a unit to increase its Class IX block by up to 300 percent. (paragraph 3)
Further considerations include the height and size of obstacles, slope, suitability, topography, wind direction, demarcation line, turbulence, null areas, escape or departure routes, drop-off, wave off, elevation, density altitude, and power available versus power required. (paragraph 3)