NSTM Chapter 573, Booms Flashcards
Boom loads shall never be suspended over ___
Personnel
SWL
Safe working load
Any load within 10 percent of the SWL, or any oblong or oversize loads
Heavy lift
All heavy lifting operations shall be under the direct supervision of the ___
1LT or weapons officer
___ shall be used during all heavy lifts
Tag lines
Operators shall not leave the winch controls with ___
A load suspended in the rig
Never stand between a load and a ___
Fixed object
___ shall be employed to assist an operator who cannot see
Signalman or winch tender
Communication between the signalman and winch operator is achieved through the use of ___
Standard hand signals
Never turn your back on a ___
Moving or suspended load
A triangular steel plate with holes in the corners used to connect the topping lift wire, the bull chain, and the bull line
Bale
The ___ is shackled to the top hole in the bale, and the ___ are shackled to the bottom two holes
Topping lift wire
Bull chain and bull line
Structural member used for lifting, transferring, or supporting heavy weights aboard ship
Boom
Three parts of a boom
Gooseneck
Linkband
Slack wire fair-lead
Sheave assembly containing one or more sheave wheels which is used to fairlead wire or rope
Block
Blocks are often described in terms of ___
Their location in the system
Used to hold the boom at its desired working angle
Bull chain
Bull chain is normally made of ___
1 - 1/4” heavy duty open link chain
Wire of considerable length, shackled to the lower corner of the bale and used as the hauling part of a topping lift
Bull line
Winch power is used to raise and lower the boom by taking the bull line from its cleat to the ___
Gypsy head or drum
Curved or angular piece of metal or other suitable device for pulling, lifting, lowering, or suspending loads
Cargo hook
The assembly that is used to connect a boom to the ship structure
Gooseneck
Any wire, line, or block and tackle assembly that provides athwartship support or motion for a boom head or the head of a gin pole
Guy
An apparatus used for lifting and supporting heavy loads
Hoist
Used to support booms and misc rigging
Kingspost
Metal strap or cap with integral padeyes, attached to the boom near its head, provide attachment points for all rigging used to support or operate the boom
Linkband
Single length of wire rope attached to the end of a block and tackle assembly, and used to extend the distance spanned by the purchase
Pendant
Any line, wire, or chain that acts as a safeguard if something else carries away
Preventer
Tackle, lever, or device that provides mechanical advantage or power
Purchase
Hoist wires which are fairled through a block at the hook assembly to increase mechanical advantage
Runner
Maximum allowable working load that can be applied to a piece of equipment
Safe Working Load (SWL)
The SWL of a subsystem level component shall be ___ than that of the overall system
Equal to or greater than
Safety feature which is used to prevent the cargo whip from dangling
Slack wire fairlead
Piece of standing rigging to support the rig for and aft of the mast
Stay
Holds the boom in position until the topping lift wire can be taken to the winch
Stopper chain
Stopper chain is at least ___ long and is wrapped around the ___ on a ___
6 ft
Topping lift wire
Multiple purchase topping lift
Multiple part rigging between the block at the boom head and a block at the king post head, with the hauling part leading down to a winch, cleat, or padeye
Topping lift
Line or purchase used to train the boom outboard and restrain it against inboard movement
Vang
Hoist wires that terminate at the hook assembly
Whip
