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

2 2016

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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.

Position Cross-Checking on ECDIS in View of International Regulations Requirements and OCIMF Recommendations

Legieć W.

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

2016

Vol. 10, no. 1

105--113

In this paper author suggest methods for position cross-checking on modern bridge equipped with ECDIS. Terrestrial navigation techniques in relation to newly implemented technology are adopted to fulfil international requirements and recommendations. Author proposes voyage recording procedures conforming to IMO requirements ready to be used as navigational procedures in Safety Management System. Vessel Inspection Questionnaire of Ship Inspection Report Programme is used to systematize the needs. Differences in approach between paper charts and ECDIS navigation are exposed and clarified serving as a guide for ships liable to undergo vetting inspection. Author shows both, advantages and weak points of various ECDIS features using as an example ECDIS manufactured by Japan Radio Company.