Deck Cargo Operations

Draft Survey - General Knowledge

Theoretical and practical draft survey knowledge is essential in determining of cargo quantity onboard. This test includes questions on draft survey procedure, factors affecting proper calculation, types of corrections, water density determination, ship's behaviour, draft marks reading, tanks and consumables. Designed for deck officers willing to improve and/or refresh their knowledge on the draft survey.

Questions 15

Time Limit 10 min

Language English

Sample Questions

Here are some example questions from this quiz. Download the GYRO app to take the full test.

Question 1

A ship trims about the longitudinal centre of flotation (LCF). What is the position of LCF when ship is loaded?

A slightly aft of midships

B slightly foreward of midships

C exactly midships

Question 2

How should the deck line be used to determine freeboard?

A The distance from the upper edge of the load line (water surface) to the upper edge of the deck line.

B The distance from the upper edge of the load line (water surface) to the lower edge of the deck line.

C The distance from the upper edge of the load line (water surface) to the middle part of the deck line.

Question 3

Second trim correction (Nemoto’s correction) is ...

A to take into account the position change of LCF (Longitudinal Centre of Flotation) as the vessel trims

B to correct the Draft Midships to the TMD (True Mean Draft) at the LCF (Longitudinal Centre of Flotation)

Question 4

If the LCF (Longitudinal Centre of Flotation) and Trim are in the same direction regarding midships (for example, stern trim and LCF is astern from midships) the correction is positive

A True

B False

Question 5

Sounding is ...

A the distance from the bottom of a tank to the top of the liquid within it.

B the distance from the top of a tank to the bottom of the liquid within it.

C the distance from the top of a tank to the top of the liquid within it.

D the distance from the bottom of a tank to the center of buoyancy of the liquid within it.

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