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.

Питань 15

Час 10 min

Мова Англійська

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Питання 1

What is the water density shown on the picture?

A 1.023

B 1.0225

C 1.022

D 1.024

Питання 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

Питання 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.

Питання 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.

Питання 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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