[Code of Federal Regulations]
[Title 33, Volume 2]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR164.40]

[Page 609]
 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 164--NAVIGATION SAFETY REGULATIONS--Table of Contents
 
Sec. 164.40  Devices to indicate speed and distance.

    (a) Each vessel required to be fitted with an Automatic Radar 
Plotting Aid (ARPA) under Sec. 164.38 of this part must be fitted with a 
device to indicate speed and distance of the vessel either through the 
water or over the ground.
    (b) The device must meet the following specifications:
    (1) The display must be easily readable on the bridge by day or 
night.
    (2) Errors in the indicated speed, when the vessel is operating free 
from shallow water effect, and from the effects of wind, current, and 
tide, should not exceed 5 percent of the speed of the vessel, or 0.5 
knot, whichever is greater.
    (3) Errors in the indicated distance run, when the vessel is 
operating free from shallow water effect, and from the effects of wind, 
current, and tide, should not exceed 5 percent of the distance run of 
the vessel in one hour or 0.5 nautical mile in each hour, whichever is 
greater.

[CGD 83-004, 49 FR 43467, Oct. 29, 1984, as amended by USCG-1998-3799, 
63 FR 35532, June 30, 1998]