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

What is the water density shown on the picture?

A 1.023

B 1.0225

C 1.022

D 1.024

Question 2

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 negative

A False

B True

Question 3

Measuring drafts in a swell is ...

A acceptable. Totally 6-12 mean readings should be obtained. The highest and lowest means should be rejected and then the average of the remainings will give the most accurate reading.

B prohibited. The figures will be inaccurate. Vessel needs to wait for the sea to become calm and make proper draft survey.

Question 4

Displacement is ...

A the total weight of the ship when it is fully loaded with cargo, crew, fuel, ballast, fresh water and stores.

B weight of the ship including the engine, accommodation and cargo space but not including crew, cargo, fuel, ballast, fresh water and stores.

C equal to ship's Constant.

D “total inside space” of the ship, including areas like cargo holds, engine rooms, and crew spaces. It’s about “volume”, not weight. Determines port fees and safety rules for a ship.

Question 5

Which factors can affect proper draft marks reading?

A Parallax error

B Distances to perpendiculars

C Squat, wind, wave

D Water density

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