Posted by Capt. Hadi Supriyono, MM, M.Mar
(g) A vessel at anchor shall at intervals of not more than one minutering the bell rapidly for about 5 seconds. In a vessel of 100 meters ormore in length the bell shall be sounded in the forepart of the vesseland immediately after the ringing of the bell the gong shall be soundedrapidly for about 5 seconds in the after part of the vessel. A vesselat anchor may in addition sound three blasts in succession,namely one short, one prolonged and one short blast, to give warningof her position and of the possibility of collision to an approachingvessel.
(h) A vessel aground shall give the bell signal and if required thegong signal prescribed in paragraph (g) of this Rule and shall, in addition,give three separate and distinct strokes on the bell immediatelybefore and after the rapid ringing of the bell. A vessel aground may inaddition sound an appropriate whistle signal.
(i) A vessel of less than 12 meters in length shall not be obliged togive the above-mentioned signals but, if she does not, shall makesome other efficient sound signal at intervals of not more than 2 minutes.
(j) A pilot vessel when engaged on pilotage duty may in addition tothe signals prescribed in paragraphs (a), (b) or (g) of this Rule soundan identity signal consisting of four short blasts.
In or near an area of restricted visibility, whether by day or night, thesignals prescribed in this Rule shall be used as follows:
(a) A power-driven vessel making way through the water shallsound at intervals of not more than 2 minutes one prolonged blast.
(b) A power-driven vessel underway but stopped and making noway through the water shall sound at intervals of not more than 2minutes two prolonged blasts in succession with an interval of about2 seconds between them.
(c) A vessel not under command, a vessel restricted in her ability tomaneuver, a vessel constrained by her draft, a sailing vessel, a vesselengaged in fishing and a vessel engaged in towing or pushinganother vessel shall, instead of the signals prescribed in paragraphs(a) or (b) of this Rule, sound at intervals of not more than 2 minutesthree blasts in succession, namely one prolonged followed by twoshort blasts.
(d) A vessel engaged in fishing, when at anchor, and a vesselrestricted in her ability to maneuver when carrying out her work atanchor, shall instead of the signals prescribed in paragraph (g) of thisRule sound the signal prescribed in paragraph (c) of this Rule.
(e) A vessel towed or if more than one vessel is towed the last vesselof the tow, if manned, shall at intervals of not more than 2 minutessound four blasts in succession, namely one prolonged followed bythree short blasts. When practicable, this signal shall be made immediatelyafter the signal made by the towing vessel.
(f) When a pushing vessel and a vessel being pushed ahead arerigidly connected in a composite unit they shall be regarded as apower-driven vessel and shall give the signals prescribed in paragraphs(a) or (b) of this Rule.
A vessel engaged in mineclearance operations shall, in additionto the lights prescribed for a power-driven vessel in Rule 23 or to thelights or shape prescribed for a vessel at anchor in Rule 30 as appropriate,exhibit three all-round green lights or three balls. One of theselights or shapes shall be exhibited near the foremast head and oneat each end of the fore yard. These lights or shapes indicate that it isdangerous for another vessel to approach within 1000 meters of themineclearance vessel.Vessel
Every vessel shall at all times proceed at a safe speed so that shecan take proper and effective action to avoid collision and be stoppedwithin a distance appropriate to the prevailing circumstances andconditions.In determining a safe speed the following factors shall be amongthose taken into account:
(a) By all vessels:
(i) the state of visibility;
(ii) the traffic density including concentrations of fishing vesselsor any other vessels;
(iii) the maneuverability of the vessel with special referenceto stopping distance and turning ability in the prevailing conditions;
(iv) at night, the presence of background light such as fromshore lights or from back scatter of her own lights;
(v) the state of wind, sea and current, and the proximity ofnavigational hazards;
(vi) the draft in relation to the available depth of water.
(b) Additionally, by vessels with operational radar:
(i) the characteristics, efficiency and limitations of the radarequipment;
(ii) any constraints imposed by the radar range scale in use;
(iii) the effect on radar detection of the sea state, weatherand other sources of interference;
(iv) the possibility that small vessels, ice and other floatingobjects may not be detected by radar at an adequate range;
(v) the number, location and movement of vessels detectedby radar;
(vi) the more exact assessment of the visibility that may bepossible when radar is used to determine the range of vesselsor other objects in the vicinity.
When two power-driven vessels are crossing so as to involve riskof collision, the vessel which has the other on her own starboard sideshall keep out of the way and shall, if the circumstances of the caseadmit, avoid crossing ahead of the other vessel.
See the movie bellow
(a) When two power-driven vessels are meeting on reciprocal ornearly reciprocal courses so as to involve risk of collision each shallalter her course to starboard so that each shall pass on the port sideof the other.
(b) Such a situation shall be deemed to exist when a vessel seesthe other ahead or nearly ahead and by night she could see themasthead lights of the other in a line or nearly in a line and/or bothsidelights and by day she observes the corresponding aspect of theother vessel.
(c) When a vessel is in any doubt as to whether such a situationexists she shall assume that it does exist and act accordingly.
Sea the movie bellow
(a) Notwithstanding anything contained in the Rules of Part B,Sections I and II, any vessel overtaking any other shall keep out ofthe way of the vessel being overtaken.
(b) A vessel shall be deemed to be overtaking when coming up withanother vessel from a direction more than 22.5 degrees abaft herbeam, that is, in such a position with reference to the vessel she isovertaking, that at night she would be able to see only the sternlightof that vessel but neither of her sidelights.
(c) When a vessel is in any doubt as to whether she if overtakinganother, she shall assume that this is the case and act accordingly.
(d) Any subsequent alteration of the bearing between the two vesselsshall not make the overtaking vessel a crossing vessel within themeaning of these Rules or relieve her of the duty of keeping clear ofthe overtaken vessel until she is finally past and clear.
Please see the movie how to overtaking procedure as per the rule 13 /Thank ridwan garcia