EXAM #3 Flashcards
If you shorten the scope of anchor chain, the anchor’s holding power may?
Decrease
Generally, the maximum speed for letting go the anchor is?
4 knots
The safety stopper that prevents the anchor chain from running free if the chain jumps the wildcat is the?
riding pawl
The slowest speed the vessel can travel while allowing the operator to maintain directional control and produce minimum water turbulence is referred to as?
bare steerage
The highest percentage of vapor at which an explosion will occur is referred to as the?
Upper Explosive Limit (UEL), Upper Flammable Limit (UFL)
It is easier to dock a single-screw vessel with a right-hand turning wheel going ______ side to the dock.
port
A bow thruster generally loses its effectiveness when the ship speed exceeds?
2 knots
The ______ propeller always turns the same direction for ahead and astern motion.
controllable pitch
Using the anchor to assist in controlling the movement of the vessel is called __________ the anchor.
dredging
term applied to the bottom shell plating in a double-hull ship is ________.
outer bottom
The anchors on the bow are known as _____ anchors.
bower
The function of the bilge keel is to ________ of the vessel.
reduce the rolling
The two types of framing systems are _______ and ______.
transverse, longitudinal
_______ help to determine the shape of the ship by supporting and stiffening the shell plating.
Frames
The term “strake” is used in reference to ________.
hull plating
The first transverse bulkhead aft of the stem is known as the _______ bulkhead.
collision
The forward movement of a vessel in one revolution of its propeller is measured by ________.
the pitch
The opening in the deck beneath the anchor windlass that leads to the chain locker is the _______.
spill pipe
The part of the windlass which physically engages the chain during hauling or paying out is the _______.
wildcat
Vertical flat plates running transversely and connecting the vertical keel to the margin plates are called the ________.
floors
As the angle of the stock and anchor chain with the bottom increases, the holding power of the anchor _____.
decreases
The machinery associated with heaving in and running out anchor chain is the _______.
windlass
In the Dry Dock, the ship sits on _______ and ________.
keel blocks, bilge blocks
As the propeller turns, voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency, pitting of the blades, and vibration. These voids are known as?
cavitation
The _______ takes control of the ship once the bow crosses the ______ of the Dry Dock.
Dry Dock Master, sill
When turning a vessel in shallow water, the ________ increases
turning diameter
______ is the process of mixing paint back and forth between two cans.
Boxing
The double bottom ________ support the ________ or tank top.
floors, inner bottom
While positioning and anchoring your vessel, the best time to let go the anchor is when the vessel is _______ and _______.
stemming the current, moving slowly astern over the ground
When dropping the anchor, you are stationed at the windlass brake. The most important piece of PPE to have on is _______.
goggles
The distance gained in the direction of the original course when you are making a turn is known as _______.
advance
You are on a course of 270 degrees True and put the rudder left 30 degrees. Transfer will be measured in the direction of ______ degrees True
180
The pivot point of a fully loaded vessel with normal trim, proceeding ahead at sea speed is located ____________
one third the length of the vessel from the bow
You are conning a twin-screw vessel going ahead with rudders amidships. If the starboard screw stops turning, the bow will go to _______.
starboard
You are on a single-screw vessel with a left-handed propeller making no way in the water. When you apply left rudder the bow will _________
not move-the vessel has no way
You are on a single-screw vessel with a right-hand propeller. The vessel is going full astern, making sternway, with full right rudder. The bow will go to _____.
port
When underway and proceeding ahead, as the vessel speed decreases the pivot point tends to _______.
move aft
If your vessel is dragging her anchor in a strong wind, you should ________.
pay out more chain.
Lifting the anchor from the bottom is called _______.
weighing anchor
Before letting the anchor go, you should check to be sure the _____ is disengaged.
wildcat
In order to permit drainage of water to scuppers, which direct the flow overboard, decks are _______.
cambered
When anchoring, it is a common rule of thumb to use a length of chain _____ the depth of the water
5-7 times
The length of a standard “shot” of chain is ____ feet.
90
To safely anchor a vessel there must be sufficient “scope” in the anchor chain. Scope is the ratio of the ___ of chain to ____ of water.
length, depth
The _______ is generally used to connect shot of anchor chain.
detachable link
A bare steel surface should have a ______ color prior to painting
metallic
______, used to minimize galvanic corrosion, are replaced on the hull of a ship during a dry dock period.
sacrificial zinc anodes
The _____ propeller always turns the same direction for ahead and astern motion.
controllable pitch
Federal regulations require that you must maintain a proper _______ when you are at anchor.
anchor watch
When dredging the anchor, the length of anchor chain used will be ________
1.5-2 times the distance from the hawse pipe to the bottom.
The open end of a graving dock is usually closed by a ______ or a ______.
floating caisson, gate
Name the three lines that a Tug attaches to a ship:
- Backing Line
- Tow Strap
- Stern Line
Tugs power used to move the ship _______ or to _______ ship’s speed.
laterally, reduce
Lashing up a tug to a ship is usually done on ________ ships.
dead
A Tug should be angled into the ship about _____ degrees to maximize propeller and rudder efficiency.
15
Tugs may cause unwanted _____ or _____ motion
lateral, longitudinal
In restricted space the _____ has an advantage over the tug on the bow.
thruster
To produce thrust the impeller in the tunnel must build up a _________.
substantial flow of water
A bow thruster will pivot a ship about a point that is approximately ____________.
one ship’s beam forward of the beam
T/F: Thrusters are usable at very light drafts.
False
A thruster is most useful at speeds of _______.
two knots or less.
Bow thruster moves the _____ directly over in the direction of the desired swing.
foreship
Speed is the cause of ____ % of accidents.
90
5 Steps to Voyage Planning:
- Objective
- Appraisal
- Planning
- Execution
- Monitoring
Controllable Pitch Propellers are usually _____ turning.
left hand
T/F: The engine on a controllable pitch propeller doesn’t need to be stopped to go astern.
True
Controllable pitch propellers can easily foul a _______ because the are always spinning.
mooring line
Twin screws are usually ________ turning
outboard
The effectiveness of a rudder is measured by the _________
flow of water across it
The rudder has little effect to ______ until the ship develops stern way.
backing
_______ includes everything between the wheel in the pilot house to the rudder.
“Steering Gear”
The steering system is made up of three parts:
- control equipment
- power unit
- transmission to the rudder stock
Must be _____ independent means of steering.
2
The power and torque capability must be such that the rudder can be swung from ___degrees on one side to ___degrees on the other side with the ship at _____ speed and ______ draft
35, 35, maximum, deepest
The time from 35 degrees on one side to 30 degrees on the other side must not exceed _____ seconds.
28
An alarm that is Visual and audible located on Bridge and at Engine Room Control Station. Must go off if power fails to either of the steering power units.
Power Failure
An alarm that is Visual and Audible located on Bridge and at Engine Room Control Station. Indicates overload or problem with motor or pump. If pump should kick off line while in operation the alarm will notify the watch.
Motor Alarm
An alarm that is Visual and audible located on Bridge and at Engine Room Control Station. Indicates power failure to any steering gear control circuit or remote control circuit
Control Power Failure
An Alarm that is Visual and audible located on Bridge and at Engine Room Control Station. Indicates which power unit us running and which is on standby.
Motor Running Indicatorsq
An alarm that is Visual and audible located on Bridge and at Engine Room Control Station. Indicates low oil level in the hydraulic oil tank that supplies any power unit. Very serious casualty needing immediately attention. Secure the pump and if circumstances permit, determine cause of oil loss before starting other unit. Storage tank must have sufficient capacity to totally refill the steering gear oil pumps piped to the tank.
Low Oil Level Alarm
______ automatically steer the ship on a set course.
Autopilot
The 1st autopilot was installed on the tanker ______
J.A. Moffat
Define: Helmsman steers ship by use of the ship’s wheel. The helmsman operates the helm assembly to the desired helm order and the ship responds to the ordered helm change?
Hand Electric
Define: The Rotary Power Unit solenoids are controlled directly and no follow up is provided. The helm and rudder remain at the angle set until such time as the helm and rudder are brought back to amidships?
Non Follow Up
