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The Seaman Aloft
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Seaman - Military manual for the Seaman rate
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Rigging for Self-Lowering
A recommended method of securing gantlines is diagrammed in figure 4-30. The end of the chair gant- line is secured to the end of the dummy gantline by butting the two ends together and seizing with turns of rope yarn back and forth between strands, so everything will  pass  through  the  sheave  without  fouling.  The  chair gantline is hauled up and through by the dummy gant- line, the chair is heaved from the deck to the crosstree, and the hauling part is passed down to the party on deck. Never attempt to hoist the chair aloft with the dummy gantline. All tools and equipment are attached to the chair so hands are free and to ensure the safety of anyone below from falling objects. When you are ready to go up, and the deck crew is ready to heave around, get in the chair and give a signal for them to pull you up. Help them by hauling down on the hauling part. Keep your hands clear of the part the chair is on or they may get jammed into the sheave when you are two-blocked to the truck. When the desired working height has been reached, signal the crew below and sing out “AVAST HEAVING”. The deck crew will stop pulling and hold the chair in place. Reach above the double becket bend and  firmly  squeeze  the  two  parts  of  the  gantline together. When you have a good grasp, command the deck crew “UP BEHIND.” This tells them to let go of the gantline. Warning: At this point, your grasp keeps the chair from falling. With your right hand, pull the gantline through the bridle and squeeze them together just above the double becket bend. Now the strain is on the bridle as in the first view of figure 4-31. With your free left hand, pull up some slack from below so you have enough to pass over your head, clear around the chair, and under your feet, as in the second view of figure 4-31. The maneuver is a bit tricky, especially if you have a bucket or two hanging on the chair, but you will not have any trouble if you have enough slack pulled up. Keep hold of the gantline with your right hand until you have worked the hitch up to the apex of the bridle as shown in the third view of figure 4-31. Then hold the two parts of the gantline Figure 4-30.–Method of securing gantlines. above your right hand with your left, and work the rest of the slack down. You are now in no danger of falling, and all you have to do to lower the boatswain's chair is pull up slack and pass it around. Before you go aloft for the first time, though, you should practice hanging off deck a few times. RIDING DOWN STANDING RIGGING Standing rigging usually leads too far out from the mast for you to lower yourself when slushing down. Someone must lower you from on deck. In riding down standing rigging, bend the tail of your gantline (fig. 4-31) to a shackle placed around the wire. Never place the shackle pin on the wire. It may unscrew as it travels along, and if it opens and lets go, you will swing back against the mast hard enough to injure yourself. Always put the bow of the shackle around  the  wire. Personnel must adhere to the following safety pre- cautions  when  working  aloft: Obtain permission from the officer of the deck before  going  aloft. Make sure radio and radar units are OFF and that antennas are guarded. A “man aloft chit” is processed to ensure that key personnel are aware of any work being done aloft. The chit is signed by the ship’s electrical maintenance  officer  (EMO),  communications  officer (COMMO), and command duty officer (CDO). Tools  and  equipment  will  be  tied  to  the boatswain's chair to prevent objects from falling on personnel  below. Wear a safety harness and secure it to a fixed object above you once you are aloft. WORKING OVER THE SIDE LEARNING  OBJECTIVE:  Explain  the procedures for working over the side and taking  soundings. Personnel preparing to work over the side should notify the officer of the deck (OOD). Upon securing, personnel  should  again  notify  the  OOD. All personnel working over the side of the ship on stages, boatswain's chairs, and on work floats or boats along the side of the ship are required to wear life 4-38

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