end is for day use. The night end produces a red flame; the day end produces orange smoke. Each end burns for about 20 seconds. The night end has bumps around its outer edge, approximately one-quarter inch from the end. This identifies it as the night use end. Follow the instructions printed on the signal. Mk 124 Mod 0 Marine Smoke and Illumination Signal The Mk 124 Mod 0 marine smoke and illumination signal (fig. 11-28) is also used for either day or night signaling by personnel on land or sea. It is a ONE hand operable device that emits orange smoke for daytime use and red flare for nighttime use. Burning time for each end is about 20 seconds. Each end has protective plastic caps. The night end has two prominent raised bead circles on the casing to positively identify this end, by the sense of touch, for nighttime use. A label on the outer surface around the whole body of the signal further identifies the smoke (day) and flare (night) ends. The label also gives detailed instructions on how to use the signal. Distress Marker Light (Strobe) The battery-operated strobe light (fig. 11-29) emits a high-intensity white flashing light 40 to 60 times per minute. The light is visible at great distances and is used to attract the attention of SAR aircraft, ships, or ground rescue parties. It is located in a pouch attached to the personal flight deck inflatable life preserver and other rescue kits. An infrared filter lens and a blue flash guard lens are provided in the individual survival kit for signaling in combat areas. SURVIVAL RADIOS AND BEACONS There are several types and models of survival radios and beacons that are carried on personnel, in aircraft, or stowed inside life rafts. Radios and beacons are used for different purposes. Radios are used to establish two-way communication, on one or more channels, between aircrew and rescue personnel. Beacons transmit only a swept tone signal for search and rescue (SAR) parties to home in on. Radios and beacons are sometimes combined into one system. Instructions for use of survival radios and beacons are on instruction plates as part of the equipment. Q11-14. How many parts are there to the individual survival kit? Q11-15. How many flares are contained in the Mk 79 Mod 0 Illumination kit? Q11-16. What hand-held signaling device produces an orange smoke? RESCUE LEARNING OBJECTIVE: Identify items of land and sea rescue equipment and their uses. Land and sea rescue starts when a distress is reported or when a reporting point or arrival time is exceeded. Both military and civilian authorities may react to an emergency. This is called search and rescue (SAR). Search and rescue craft could be anything from a ship, boat, or fixed-wing aircraft to a fully equipped rescue helicopter with rescue swimmer. The method of searching and rescuing personnel depends on a great many factors, such as location, time, environment, equipment, and personnel. Ditching or bailout often occurs a great distance from a rescue craft. When this happens, military aircraft are diverted or launched to the SAR area. At sea, fixed-wing aircraft equipped with droppable life raft kits may arrive at the scene and drop a raft to the survivors until the rescue helicopter or surface vessel arrives. The SAR life raft provides communications, medical, and survival items. RESCUE EQUIPMENT All naval personnel should be familiar with the equipment used in rescue. The following text discusses rescue equipment and lifting devices that may be used. Hoisting Cable and Rescue Hook Assembly The primary rescue device used in helicopter rescue is the hoisting cable and double rescue hook 11-21 ANf1129 Figure 11-29.—Distress marker light (strobe).