1. What vessels do COLREG rules 1983 apply to ? a) To all vessels navigating in international waters. b) To all vessels navigating in roadsteads, straits and open seas. c) To all vessels upon the high seas and in all waters connected therewith. 2. What does the word "vessel" mean, according to the COLREG rules ? a) Any watercraft capable of floating on water without propelling machinery. b) Any watercraft including non-displacement craft and seaplanes used or capable of being used as a means of transportation on water. c) Any floating object fitted with propelling machinery. 3. What does the word "seaplane" mean ? a) Any aircraft designed to carry out hydrotechnical and/or hydrometeorological work. b) Any aircraft designed to manoeuvre on the water. c) Any aircraft being on the water for various reasons. 4. What vessel may be considered as "vessel restricted in her ability to manoeuvre" ? a) A vessel engaged in replenishment or transferring persons, provisions or carge while underway. b) A vessel lying to, on stormy weather. c) A vessel with damages to the steering gear. 5. What vessel may be considered as "vessel restricted in her ability to manoeuvre" ? a) A vessel engaged in towing, having the towing line less than 50 M in lenght. b) A pushing tug boat, underway, at night. c) A vessel engaged in towing operation such as severely restricts the towing vessel and her tow in their ability to deviate from their course. 6. To what vessel is the term "vessel restricted in her ability to manoeuvre" limited to ? a) The term "vessel restricted in her ability to manoeuvre" will not be limited to the vessels quoted in the rules. b) It is limited to te vessels quoted in the rules. c) It is limited to the damaged vessels which are unable to keep out of the way of another vessel.