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The Obligations of Single-Propeller Vessels at the Head-On Situation

Sahin B.

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

2016

Vol. 10, no. 1

101--104

Manoeuvring characteristics of the vessels at the head-on situation are examined in this study. The meetings between the power-driven vessels are considered based on their propellers. These vessels can either have a single propeller or double propellers. A vessel with a single right-handed propeller alters her course to port side easier than the starboard side. There exists an unnoticed gap, therefore the authors discuss the International Regulations for Preventing Collisions at Sea, 1972 (COLREGs), Rule 14, considering the vessel orientation based on its propeller walk. After presenting all possible cases and their probable consequences, this paper offers authorities to embed the information of propeller characteristics into the Automatic Identification Systems (AIS) in order to prevent misunderstandings during the VHF communications, probable collision risks and discussions on liability issues in case of marine accidents.

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.