ACR Electronics Nauticast2 Spezifikationen PDF herunterladen (Seite 53)

MARINE HORNS & WHISTLES

IMO Requirements

What are the international requirements for marine horns (ship's whistles)?

The 1972 Intemational Regulations for Preventing Collisions at Sea ('72 COLREGS), ANNEX III, entered into force by the

International Maritime Organization (IMO), specifies the technical requirements for sound signal appliances on marine ves-

sels. Frequency range and minimum decibel level output is specified for each class of ship. The class is determined by the

vessel's length. Sound pressure level intensity at a distance of one meter from the horn is stipulated, which determines the

theoretical range of the horn, although the actual range will, under many conditions, be much greater than this. This infor-

Whistle

Class

Length of

Vessel in

Meters

Limits of

Fundamental

Frequency

Minimum

Sound Pressure

Level Measured

in 1/3 Octave

Band at 1 Meter

Audibility

Range in

Nautical

Miles

I > 200 70-200 Hz 143 dB 2

II 75-200 130-350 Hz 138 dB 1.5

III 20-75 250-700 Hz 130 dB 1

IV < 20 250-700 Hz 120 dB 0.5

Certificates of Conformity

Certificates for Kahlenberg Horns have been issued by the U.S. Coast Guard, ABS, and the British MCA, among

others, confirming their compliance with the '72 COLREGS.

Installation

The '72 COLREGS also give recommendations relating to the installation of whistles with which installers and op-

erators should be familiar.

Selection:

Class I Class II Class III Class IV

Vessel Length Over

200 Meters (650 ft.)

Vessel Length 75

-200 Meters (246

-656 ft.)

Vessel Length 20-75

Meters (65-246 ft.)

Vessel Length

Under 20 Meters

(65 ft.)

S-203C

S-203CHT

KPH-130

S-216C

S-216CHT

S-203C

S-203CHT

D-4A

Q-4

T-4A

KPH-130

S-2 T-3A

S-2CV Q-3A

S-2CHT F-2

D-1 F-3

D-2 KDT-123

D-2CVL O2M

T-1 KB-20

T-2

S-0A

D-0A

T-0A

Kahlenberg Whistles in Each Class

WTN Electronics, Ltd.

Tel: 763-473-3825

Fax: 763-473-3521

Email: info@wtnltd.com

16920 28th Ave. N.

Minneapolis, MN 55447

U.S.A.

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