[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 46CFR97.19-1]



[Page 72-73]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)

 

PART 97_OPERATIONS--Table of Contents

 

                Subpart 97.19_Maneuvering Characteristics

 

Sec.  97.19-1  Data required.





    For each ocean and coastwise vessel of 1,600 gross tons or over, the 

following apply:

    (a) The following maneuvering information must be prominently 

displayed in the pilothouse on a fact sheet:

    (1) For full and half speed, a turning circle diagram to port and 

starboard that shows the time and the distance of advance and transfer 

required to alter the course 90 degrees with maximum rudder angle and 

constant power settings.

    (2) The time and distance to stop the vessel from full and half 

speed while maintaining approximately the initial heading with minimum 

application of rudder.

    (3) For each vessel with a fixed propeller, a table of shaft 

revolutions per minute for a representative range of speeds.

    (4) For each vessel with a controllable pitch propeller a table of 

control settings or a representative range of speeds.

    (5) For each vessel that is fitted with an auxiliary device to 

assist in maneuvering, such as a bow thruster, a table of vessel speeds 

at which the auxiliary device is effective in maneuvering the vessel.

    (b) The maneuvering information must be provided in the normal load 

and normal light condition with normal trim for a particular condition 

of loading assuming the following--

    (1) Calm weather--wind 10 knots or less, calm sea;

    (2) No current;

    (3) Deep water conditions--water depth twice the vessel's draft or 

greater; and

    (4) Clean hull.

    (c) At the bottom of the fact sheet, the following statement must 

appear:



                                 Warning



    The response of the (name of the vessel) may be different from those 

listed above if any of the following conditions, upon which the 

maneuvering information is based, are varied:

    (1) Calm weather--wind 10 knots or less, calm sea;

    (2) No current;

    (3) Water depth twice the vessel's draft or greater;

    (4) Clean hull; and

    (5) Intermediate drafts or unusual trim.



    (d) The information on the fact sheet must be:

    (1) Verified six months after the vessel is placed in service; or

    (2) Modified six months after the vessel is placed into service and 

verified within three months thereafter.

    (e) The information that appears on the fact sheet may be obtained 

from:

    (1) Trial trip observations;

    (2) Model tests;

    (3) Analytical calculations;

    (4) Simulations;

    (5) Information established from another vessel of similar hull 

form, power, rudder and propeller; or

    (6) Any combination of the above.



The accuracy of the information in the fact sheet required is that 

attainable by ordinary shipboard navigation equipment.

    (f) The requirements for information for fact sheets for specialized 

craft such as semi-submersibles, hydrofoils,



[[Page 73]]



hovercraft and other vessels of unusual design will be specified on a 

case by case basis.



[CGD 73-78, 40 FR 2689, Jan. 15, 1975]