Hydrodynamics of High-Speed Marine Vehicles

Chapter 10: Maneuvering

10.1 Introduction

High standards for maneuverability are required for high-speed vessels to operate, particularly in congested areas, where emergency maneuvers may be necessary to avoid collisions. An important aspect is training of personnel who operate the vessels. A maneuvering simulator is then a useful tool. This requires mathematical models that reflect the very different physical features of the various categories of high-speed vessels. The maneuvering characteristics of a vessel are documented in terms of turning circle maneuver, zigzag (Z) maneuver and crash astern test. The IMO (International Maritime Organization) maneuvering criteria from 2002 for ships longer than 100 m are described in Table 10.1.

Table 10.1: IMO maneuvering criteria from 2002 for ships longer than 100 m at service speed

From the turning circle maneuver:

  • Turning ability at 35 rudder angle or maximum permissible rudder angle at test speed

    • Advance < 4.5 L PP

    • Tactical diameter < 5 L PP

  • Course initiating ability at 10 rudder angle

    • Traveled distance < 2.5 L PP at 10 change of heading

From the zigzag maneuver:

  • Course checking ability

    • 10 /10 Z-maneuver

      First overshoot ? 10 if L PP/ U < 10 s

      First overshoot ? 20 if L PP/ U ? 30 s

      First overshoot < (5 + 0.5 L PP/ U) for 10 s ? L PP/ U < 30 s

      Second overshoot ? 25 if L PP/ U < 10 s

      Second overshoot

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