MCRP 12-10B.1, page 332

Following a clearly marked route to avoid obstacles and prevent the resupply vehicle(s) from becoming disoriented Providing radios to resupply vehicles Issuing each vehicle a map of the AO (preferably a city map with the street names). b. Combat units operating for an extended time under conditions of limited visibility should have enough batteries to keep the night vision devices functioning at optimum power and sensitivity. c. A large operational readiness float of night vision devices should be maintained. d. Casualty collection during periods of limited visibility is more difficult. Clear methods for marking any casualties must be established before the operation begins. e. CSS operations located in existing structures should not be visible from a distance. This includes limiting vehicle traffic to an absolute minimum, sealing doors and windows to prevent light leakage, and dispersing assets as much as possible. 9. Operational Considerations. Marine units conduct attacks during periods of limited visibility to gain or sustain the momentum of the attack. Before conducting a limited-visibility attack, the commander must balance the risks and ensure that every Marine understands the mission, intent, and control measures. Rehearsals and strict command and control reduce casualties and greatly enhance the chances for mission accomplishment. a. To reduce confusion, Marines should clear buildings and rooms using the same techniques they use during the day. b. Movement rates are slower in the dark. Each Marine must remain alert for mines, boobytraps, and enemy positions. c. Rifle squads and fire teams should be equipped with a mixture of both thermal imaging and light intensification devices whenever possible. This enables the squads and fire teams to obtain a better picture of the night environment and enables Marines to balance the strengths and weaknesses of each type of night vision device for maximum results. d. When moving through buildings, assault forces mark cleared rooms and buildings and communicate with the support forces. Marking cleared rooms is especially critical if more than one assault force or element is in the same building. Communications with supporting forces are imperative to avoid fratricide. H - 6 MCWP 3-35 .3