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3 TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

3 2010

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Possible Method of Clearing-up the Close-quarter Situation of Ships by Means of Automatic Identification System

Bukaty V. M., Morozova S. U.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2010

Vol. 4, no. 3

309--313

The tonic discussed is an non-traditional approach to the earliest possible clearing up of the head-on situation, consisting in defining the time of simultaneous approach to same latitudes and longitudes, bearing in mind that the information about the ships' movement was received by means of Automatic Identification System. If the time the ships proceed to these latitudes and longitudes is the same the collision of the ships is unavoidable and by the time identified the head-on situation is immediately indicated. If the time is different the ships will not be able to reach the same point and the collision will be avoided. The attempts have been also made to evaluate the minimal admitted inequality of time when the ships' safe passage without maneuvering is considered possible. This method is rather attractive because it does not require any additional measurements and it is not neces-sary to attract the Officer-in-Charge away from his main responsibility – to control the situation round the ship.

On Determination of the Head-on Situation Under Rule 14 of Colreg-72

Bukaty V. M., Morozova S. U.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2010

Vol. 4, no. 4

383--388

Analyzed one possible criteria of stating the fact of ships' meeting on reciprocal courses and proved that none of them can be judged with confidence of head-on situation. So, in fact Rule 14 of COLREG -1972 should be strictly adhered to: “ …When a vessel is in any doubt as to whether such a situation exists we shall assume that it does exist and act accordingly…”, i. e. alter the course to starboard.

Defining of Minimally Admitted Head-on Distance Before the Ships Start Maneuvering

Bukaty V. M., Dimitrieva E. N.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2010

Vol. 4, no. 1

69--72

Without stating the very fact of head-on situation, an attempt has been made to define the minimum admitted head-on distance between the ships in order to carry out safe maneuvering at a determined the closest point of approach, taking into account the ships' maneuvering characteristics.