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Stability Trials - Coggle Diagram
Stability Trials
Pullout Maneuvers
Not commom
Indication of stability
in Straight Course
Procedure
Ship turned with rate of turn
Rudder put amidships
Stable
Rate of turn will decay to Zero
Unstable
Will not reach Zero
Bech Reverse Spiral
Alternative to Dieudonne`s
Procedure
Steer at cte rate of turn
Measure rudder angle
Results
similar to spiral
Histeresys means unstable
calibrated Rate of turn indicator
Dieudonne`s Spiral
Gives
Steady yawing rates
according to Rudder Angle
Speed does not affect
Meander Test
For Submarine
Deflect Stern planes and then stop
Vertical plane
