About Measurement of Bulk Cargoes in Ships

The technical term used to measure bulk cargo loaded and unloaded from a ship is a draft survey. Normally, all top ocean surveyors conduct draft surveys. This article describes the process of these investigations.

Before starting the process, the ship's master must be notified that the proposed investigation will be carried out on board. This should be done at least a few weeks in advance. If the survey to be carried out includes only a few initial stages, the ship's personnel should request that all ballast tanks in the ship be empty or fully pushed. There is. In addition, you need to make sure that there is a trim in the vessel's tank calibration table. Limited and completely upright.

If an independent surveyor is conducting a survey, the cooperation of the ship's officers is very important. Ideally, independent surveys should always be conducted with the assistance of the ship's chief engineer and chief officer. If for some reason no one decorates these two positions, the research team needs to be supported by their respective representatives.

Before starting the survey, the surveyor needs to carefully examine the entire arrangement. This allows him to see the number of ship ballasts, oil and freshwater tanks and determine their location. Also, the equipment used during the process should be inspected. Common devices used in draft surveys include calibrated inclinometers, draft mark indicators, seawater sampling buckets, ballast water sampling devices, and calculators.

One of the most important steps in these investigations is to read the draft mark. During this step, the ship is upright and requires minimal trim. The trim of the vessel under investigation must not exceed the maximum trim. The investigator must make sure that the ship is still in calm water to get accurate results during the investigation.

If the ship is at anchorage or at an exposed berth, investigations are usually found to not return accurate results if this is the area where the greatest waviness turbulence and waves occur. If the investigator is unable to place the container in the clam area, it will be necessary to obtain multiple measurements and obtain an average of those measurements to obtain the final measurement. The value obtained in this way was found to be almost accurate.