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Published byDominick Turner Modified over 9 years ago
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Shiphandling
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Bridge Watch Team
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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
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Bells Backing –1/3 25 RPM –2/3 50 RPM –FULL 100 RPM Ahead –1/3025 RPM –2/3 050 RPM –STD 075 RPM –FULL 100 RPM –FLK I 125 RPM –FLK II150 RPM –FLK III>150 RPM
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Bells GT - Controlled by pitch and speed of the propellar Diesel - controlled by speed Steam - controlled by the speed + 12 kts
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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
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Controllable Forces Rudder - Usually behind the prop to maximize the thrust
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Uncontrollable Forces Bernoulli’s –UNREP suction Bow and stern cushions Shallow Water Effects –Pounding –Loss of rudder effectiveness –Sink due to bernoulli’s –Squat
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Uncontrollable Forces Wind - bigger problem on a carrier Current Helmsman
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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
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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
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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.
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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
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Types of MOBs Anderson Racetrack Williamson Choice depends on time of day, ship, ships in company, sea state and water temp
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