5-45. If an aircraft is unable to receipt for a flashing light message by flashing light, what action should the pilot take? 1. Open and close the throttle 2. Give the thumbs up sign 3. Rock the wings 4. Use voice radio 5-46. In general, infrared communications using non-directional procedures are reserved for messages that have which of the following characteristics? 1. Limited distribution 2. Wide distribution 3. High priority 4. High classification 5-47. What equipment is needed to communicate with directional infrared? 1. AN/SAT 2 2. Yardarm blinkers 3. Searchlight fitted with an H-hood 4. Daylight signaling lantern 5-48. You are handed a signal after darkness for immediate delivery by infrared light. Before sending the signal, you should alert the receiving station by use of what code word over voice radio? 1. INFRARED LIGHT 2. H-HOOD 3. HIGH POCKET 4. NANCY HANKS 5-49. The flagship alerts your ship by voice radio that it has an infrared communication to transmit. What lights should you switch on to assist the flagship Signalman in aiming his light? 1. Infrared receiver 2. Infrared yardarm blinkers 3. Point-of-train light 4. Small signal light fitted with an infrared filter 5-50. What method of communications is better adapted for long messages? 1. Sound 2. Pyrotechnics 3. Flashing light 4. Semaphore 5-51. What is the main difference between signaling by flashing light and signaling by semaphore? 1. The message parts 2. The rules for visual responsibility 3. The signaling procedures 4. The use of call signs 5-52. You are sending a message by semaphore. What should you signal to indicate the end of each word? 1. Front sign 2. Attention sign 3. Separative sign 4. Numeral sign 5-53. You are receiving a semaphore message. The sender precedes and follows a six-character group by the numeral sign. What should be your reaction? 1. Record the six-characters as digits 2. Repeat each character 3. Request verification of the six characters 4. Inform the supervisor of the watch that part of the message is in code 5-54. You have a semaphore message for a nearby ship. Rather than make that ship’s call sign, you should alert the ship by making what signal? 1. Front sign 2. Attention sign 3. Code Juliett 4. Desig 5-55. What signal should you make to answer a semaphore call from another ship? 1. Answer sign 2. Desig Juliett 3. Attention sign 4. K 5-56. To alert a ship by flashing light that you are about to transmit a semaphore message, what signal should you send? 1. SEM 2. SEMAPHORE 3. STANDBY SEM 4. STANDBY SEMAPHORE 33