5.3 Criteria footnote
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Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.137(76) - Standards for Ship Manoeuvrability - (adopted on 4 December 2002) - Annex - Standards for Ship Manoeuvrability - 5 Standards - 5.3 Criteria1

5.3 Criteria footnote

 The manoeuvrability of the ship is considered satisfactory if the following criteria are complied with:

  .1 Turning ability

 The advance should not exceed 4.5 ship lengths (L) and the tactical diameter should not exceed 5 ship lengths in the turning circle manoeuvre.

  .2 Initial turning ability

 With the application of 10° rudder angle to port/starboard, the ship should not have travelled more than 2.5 ship lengths by the time the heading has changed by 10° from the original heading.

  .3 Yaw-checking and course-keeping abilities

  • .1 The value of the first overshoot angle in the 10°/10° zig-zag test should not exceed:

    • .1 10° if L/V is less than 10 s;

    • .2 20° if L/V is 30 s or more; and

    • .3 (5 + 1/2(L/V)) degrees if L/V is 10 s or more, but less than 30 s,

    • where L and V are expressed in m and m/s, respectively.

  • .2 The value of the second overshoot angle in the 10°/10° zig-zag test should not exceed:

    • .1 25°, if L/V is less than 10 s;

    • .2 40°, if L/V is 30 s or more; and

    • .3 (17.5 + 0.75(L/V))°, if L/V is 10 s or more, but less than 30 s.

  • .3 The value of the first overshoot angle in the 20°/20° zig-zag test should not exceed 25°.

  .4 Stopping ability

 The track reach in the full astern stopping test should not exceed 15 ship lengths. However, this value may be modified by the Administration where ships of large displacement make this criterion impracticable, but should in no case exceed 20 ship lengths.

Parent topic: 5 Standards
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