Part D – sound and light signals

Rule 32 – definitions

(a)   Whistle: 可以發出這些rules的聲音的工具

(b)   Short blast: one second’s duration

(c)    Prolonged blast: four to six second’s duration

short blast (1 second), and prolonged blast (4–6 seconds).

Rule 33 – equipment for sound signals

(a)   Vessel 12米或以上要有a whistle. 20米或以要有a whistle, a bell, 100米或以上, 要有a whistle, a bell, a gong. Bell 和gong的聲音不能相同.

(b)   Vessel短於12米,不用whistle, bell, gong. 可以自己用其他方法去發sound signal.

Vessels 12 metres (39.4 ft) or more in length should carry a whistle and a bell and vessels 100 metres (328 ft) or more in length should carry in addition a gong. On many vessels, a horn serves the purpose of a whistle.

Rule 34 – manoeuvring and warning signals:

(a) Vessels are in sight of one another. Power-driven vessel:

One short blast: I am altering my course to starboard

Two short blasts: I am altering my course to port

Three short blasts: I am operating astern propulsion

(b) 用了(a)的whistle signals. 可以選擇再加light signals.

(i) One flash: I am altering my course to starboard

Two flash: I am altering my course to port

Three flash: I am operating astern propulsion

(ii) Duration of each flash about one second.

Interval between flashes about one second.
Interval between signals shall not be less than 10 seconds.

(iii) The light used for this signal should be all-round white light, visible at a minimum range of 5 miles.

(c)    In sight of one another in a narrow channel or fairway.
(i) Vessel overtake another,根據9(e)(i)要用用whistle:

Two prolonged blasts, then one short blast: I intend to overtake you on your starboard side.

Two prolonged blasts, then two short blasts: I intend to overtake you on your port side

(ii) Vessel to be overtaken,答應比人爬頭,根據9(e)(i)要用:

One prolonged, one short, one prolonged, one short blast.

(d)   Vessels in sight of one another. Approaching each other. 唔知對方想點. 或者懷疑對方的action夠不夠去避免碰撞. Vessel in doubt gives at least five short and rapid blasts on the whistle. 可以再補light signal at least five short and rapid flashes.

(e)   Near a bend轉彎位. Channel or fairway where other vessels may be obscured by an intervening obstruction. Sound one prolonged blast. 如果有另一vessel聽到那聲長響,要作回應one prolonged blast.

(f)     如果船上裝了幾個whistles at a distance apart of more than 100 metres. 只需要用其中一個whistle就夠.

Rule 35 – sound signals in restricted visibility

在restricted visibility area. 不論day or night. 都要守這條rule

(a)   Power-driven vessel making way. (making way即是在水中正在移動)

每2分鐘內就要長響一次.

sound one prolonged blast at intervals not more than 2 minutes.

(b)   Power-driven vessel underway. Stopped and making no way.

At intervals of not more than 2 minutes.

Sound two prolonged blasts with an interval of about 2 seconds.

每2分鐘內,發2聲長響,間隔大約2秒.

(c)    Vessel not under command, restricted in her ability to manoeuvre, constrained by her draught, sailing vessel, vessel engaged in fishing, vessel engaged in towing or pushing another vessel.

At intervals of not more than 2minutes, sound one prolonged then two short blasts.

(d)   Vessel engaged in fishing, vessel restricted in her ability to manoeuvre. When at anchor, 不要用(g)的signal,用(c)的signal

(e)   被拖的船,如果有多於一隻被拖的船,在最後的船,每隔2分鐘,發出one prolonged, then three short blasts. 這個signal最好跟在拖船發出的signal後面

(f)     A pushing vessel and a vessel being pushed ahead連在一起,當是power-driven vessel, 用(a)(b)的signal

(g)   At anchor, 每一分鐘內,ring the bell rapidly for about 5 seconds.

一百米以上的船,在船頭ring the bell 5seconds, then船尾sound the gong 5seconds. 如果有船接近,可以再用one short, one prolonged, one short blast. To give warning.

(h)   Vessel aground 用(g)的signal. 但在前和後面,加上three strokes on the bell.

(i)     Vessel 12-20米, 可以不用(g)和(h)的signal.但要每2分鐘內發出有效的sound signal

(j)     Vessel少於12米,以上所有signal都可以不用, 但每2分鐘內要發出有效sound signal

(k)    Pilot vessel engaged in pilotage duty, 用(a)(b)(g)時,再加上four short blasts辨別身份

Rule 36 – signals to attract attention

如果要用sound or light signals 去attract attention of another vessel.

不可以用signals confused with rules.

可以將你的searchlight指向危險的地方,提醒他人,但同時不要干擾到別人的視線.

不要令人誤會是導航指示aid to navigation.

不要用high intensity intermittent不停閃 or revolving旋轉 light, 例如不要用strobe light不停閃的閃光燈.

可以用燈筒torch 去照shine你的sailing vessel.

Rule 37 – distress signals

Vessels in distress, requires assistance. 用 annex iv 的signals

ANNEX IV--DISTRESS SIGNALS  

1.  The following signals, used or exhibited either together or separately, indicate

distress and need of assistance:

(a)  a gun or other explosive signal fired at intervals of about a minute;

(b)  a continuous sounding with any fog-signalling apparatus;

(c)  rockets or shells, throwing red stars fired one at a time at short intervals;

(d)  a signal made by radiotelegraphy or by any other signalling method

consisting of the group ••• - - - ••• (SOS) in the Morse Code;

(e)  a signal sent by radiotelephony consisting of the spoken word "Mayday";

(f)  the International Code Signal of distress indicated by N.C.;

(g)  a signal consisting of a square flag having above or below it a ball or

anything resembling a ball;

(h)  flames on the vessel (as from a burning tar barrel, oil barrel, etc.);

(i)  a rocket parachute flare or a hand flare showing a red light;

(j)  a smoke signal giving off orange-coloured smoke;

(k)  slowly and repeatedly raising and lowering arms outstretched to each

side;

(l)  a distress alert by means of digital selective calling (DSC) transmitted

on:

(a)  VHF channel 70, or

(b)  MF/HF on the frequencies 2187,5 kHz, 8414,5 kHz, 4207,5 kHz,

6312kHz, 12577 kHz or 16804,5 kHz;

(m)  a ship-to-shore distress alert transmitted by the ship’s Recognized

Mobile Satellite Service Provider (RMSSP) ship earth station;

(n)  signals transmitted by emergency position-indicating radio beacons;

(o)  approved signals transmitted by radiocommunication systems, including

survival craft radar transponders.

2.  The use or exhibition of any of the foregoing signals except for the purpose of

indicating distress and need of assistance and the use of other signals which

may be confused with any of the above signals is prohibited.

3.  Attention is drawn to the relevant sections of the International Code of

Signals, the Merchant Ship Search and Rescue Manual and the following

signals:

(a)  a piece of orange-coloured canvas with either a black square and circle

or other appropriate symbol (for identification from the air);

(b)  a dye marker.