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Shiphandling - PowerPoint PPT Presentation


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Shiphandling. Bridge Watch Team. Bridge Equipment. Radio hand Sets/speakers Status Boards Chart Table Gyro repeaters Magnetic compass Radar repeaters Alarms/light panels, 1MC IC ciruits SCC - EOT/Helm or ITC/Helm. Backing 1/3 25 RPM 2/3 50 RPM FULL 100 RPM. Ahead 1/3 025 RPM

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bridge equipment
Bridge Equipment
  • Radio hand Sets/speakers
  • Status Boards
  • Chart Table
  • Gyro repeaters
  • Magnetic compass
  • Radar repeaters
  • Alarms/light panels, 1MC
  • IC ciruits
  • SCC - EOT/Helm or ITC/Helm
bells
Backing

1/3 25 RPM

2/3 50 RPM

FULL 100 RPM

Ahead

1/3 025 RPM

2/3 050 RPM

STD 075 RPM

FULL 100 RPM

FLK I 125 RPM

FLK II 150 RPM

FLK III >150 RPM

Bells
bells5
Bells
  • GT - Controlled by pitch and speed of the propellar
  • Diesel - controlled by speed
  • Steam - controlled by the speed + 12 kts
controllable forces
Controllable Forces
  • Propellers -
    • single - turn clockwise
    • double-
      • STBD - clockwise
      • PORT - counter clockwise
  • Side Force - due to the rotation of the screw
    • none on a twin screw
    • will force in the direction of rotation. It is as if the screw is walking on the bottom
controllable forces7
Controllable Forces
  • Rudder - Usually behind the prop to maximize the thrust
uncontrollable forces
Uncontrollable Forces
  • Bernoulli’s
    • UNREP
      • suction
      • Bow and stern cushions
  • Shallow Water Effects
    • Pounding
    • Loss of rudder effectiveness
    • Sink due to bernoulli’s
    • Squat
uncontrollable forces9
Uncontrollable Forces
  • Wind - bigger problem on a carrier
  • Current
  • Helmsman
definitions
Definitions
  • Pivot Point - The point on the centerline about which the ship turns
    • forward
      • small - last frame of the bridge
      • big - forward of the bridge
    • Astern
      • stern of the ship
definitions11
Definitions
  • Turning circle - line scribed by the pivot point in 360 degree turn
    • Rudder
    • Speed - real slow and fast increase the diameter
  • Advance - the distance gained toward the original course
  • Transfer - the distance gained in the direction of the turn
definitions12
Definitions
  • Tactical Diameter - the amount of transfer made in 180 turn
    • Standard - std rudder and bell
    • Reduced - any speed and full rudder
  • Kick - swinging of the stern
  • Surge - the amount of forward motion while slowing to a slower speed.
slide13
MOB
  • Pass word
  • Watch/float/smoke
  • Swing stern away
  • Select maneuver
  • 6+ blasts, oscar, red red pulsating
  • Notify company
  • Notify CO\XO
  • Man helo or boat (ready and make leeward)
  • Ensure CIC and top are doing their jobs
  • Musters
types of mobs
Types of MOBs
  • Anderson
  • Racetrack
  • Williamson
  • Choice depends on time of day, ship, ships in company, sea state and water temp