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20 Deck Marine COC And Interview Questions + Answers You May Know.

20 Deck Marine COC And Interview Questions + Answers You May Know.

Maritime career been a profession in which everyone must attend marine COC (Certificate Of Competency) exams to move to the upper rank, you need to always ready yourself on some questions that may arise during your exams or interviews.

On this article, We will like to share some of the marine COC (Certificate Of Competency) or marine interview questions you will likely meet.

Q1) Can you use same common vapor line for sulphuric acid and Nitric acid ?
A1) The answer is “NO” this is because they are not compatible.

Q2) The lowest temperature at which a liquid will give off sufficient vapors to form a flammable mixture with air should be identify as what?
A2) The flash point.

Q3) The quantity of a cargo required to be carried in a type one ship should not exceed what level?
A3) It shouldn’t exceed 1250 m3

Q4) Possibly your vessel get to pass through suez canal ,what is the status on suez canal pilots?
A4) The status is that pilotage is compulsory & the pilot is only the master’s advisor

Q5) Your vessel is moving in panama canal waters, when must the master or representative be on the bridge?
A5) The master or his or her representative must be on bridge at all times.

Q6) Does most piracy attacks take place in international or territorial water?
A6) It is confirmed that most attacks take place in the territorial waters.

Q7) What is most important when transferring route plans to other Navigational systems ?
A7) Need that both systems use same chart datum

Q8) In navigation, what is the shortest distance between two points ?
A8) Great circle is the shortest distance of two points.

Q9) What is the purpose of the function Anti sea clutter on the radar ?
A9) The purpose is to reduce reduce the sea echoes

Q10) When using a buoy as an aid to navigation, which of the following should always be considered
A10) We consider the buoy many not be in its charted position.

Q11) When taking a compass error by amplitude in the higher latitudes, when is the right time to take the bearing?
A11) After calculating the time of the sunset, then take the bearing.

Q12) what kind of information can be achieved from a NAVTEX ?
A12) Navigational warning

Q13) What is the name of the IMO publication giving guidance in search and rescue operations at sea ?
A13) Publication called MERSAR

Q14) If you are a second deck officer onboard a vessel, during the night you have been in a collision with a sailing boat and saw there are no signs of life in the water, what will be your action?
A14) Without delay, you need to alarm the rescue center & commence searching for available survivors.

Q15) What is the centre for overall co-ordination of rescue operations called?
A15) Rescue co-ordination centre.

Q16) You are officer on watch an you received a distress signal from another ship/vessel, who should you first inform?
A16) You need to inform the nearest coastal radio station.

Q17) If you are a duty officer onboard a ship that was involved in a collision. what will your actions be following the collision ?
A17) You will make sure that your ship with the crews onboard are safe and then offer your assistance to the other ship involved.

Q18) During search and rescue operations, an aircraft crosses the wake of your vessel close astern at low altitude. As officer on duty, what does this indicate if the aircraft rocks its wings opens and closes the throttle or changes the propeller pitch?
A18) This signal indicates that your assistance is no longer required.

Q19) Name one of the methods used by an aircraft to attract a vessel’s attention for participation in a rescue operation?
A19) She circle the vessel

Q20) Your ship is making sternway of about 1.6 knots and your rudder is hard to starboard. will this have any effect on the ship’s behavior?
A20) Yes , it will give the stern a lift force to starboard.


What is the search pattern system called where 1 ship and 1 aircraft are involved?

Please you can ask more questions you require to know, we will help you with the answers.

Past COC question
academic questions
photo from deck officer Facebook page ( only for sharing)

5 thoughts on “20 Deck Marine COC And Interview Questions + Answers You May Know.”

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  4. Avatar of Jon

    Tks very much for your post.

    Avoid surprises — interviews need preparation. Some questions come up time and time again — usually about you, your experience and the job itself. We&#39ve gathered together the most common questions so you can get your preparation off to a flying start.

    You also find all interview questions at link at the end of this post.

    Source: Download Ebook: Ultimate Guide To Job Interview Questions Answers:

    Best rgs