Air draught – means the vertical distance from the surface of the water to the highest point of the ship’s mast or aerial.
Bale space capacity – is that cubic capacity of a cargo space when the breadth is measured from the inside of the cargo battens (spar ceiling) and the measured depth is from the wood tank top ceiling to the underside of the deck beams. The length is measured from the inside of the fore and aft bulkhead stiffeners.
Broken stowage – is defined as that space between packages which remains unfilled. The percentage that has to be allowed varies with the type of cargo and with the shape of the ship’s hold. It is greatest when large cases are stowed in an end hold or at the turn of a bilge.
Cargo information – means appropriate information relevant to the cargo and its stowage and securing which should specify, in particular, the precautions necessary for the safe carriage of that cargo by sea.
After reviewing some comments on the posts, I decided to write this post. Flash back, this post is explains several basic calculation that usually use by marine cargo ship surveyor to complete their jobs. I think this will be usable for beginner.
Vessel Trim Calculation
Trim is different between aft draft and forward draft of the vessel.
Trim = Draft Aft (DA) – Draft Fore (DF)
Example : DF: 5.40 M, and DA: 7.25 M
Trim = 7.45 – 5.40
Trim = 2.05 M (Apparent Trim / AT)
A few weeks ago, I have got the full version of Draft Survey Software, thanks to Capt. Michael from MW Marine Services, LLC that has given me free.
Now, I have time to post the review of Draft Survey software, so the reader could give comment and feedback to software owner for next expansion. This review is based on the software I have tested. Just continue reading to check the below test.
The below screenshot show how the software works:
Fig. 1 – Data to insert for Draft Survey
In this page you should insert the ship particulars and survey data to get access to the next page.
Hi marine cargo surveyor. :). It was about three months with no posting, as I have faced busy days.
Previously, we have discussed topics about Draft survey : Terms of Conduct, Draft Survey : Procedures and Calculation, Draft Survey : Specimen of Calculation, How To Conduct Bunker Survey, and Bunker Survey Calculation. Appreciated every feedbacks and comments around the posts.
In this posts, I will generally introduce about cargo hold cleanliness survey. The hold cleanliness survey is conducted to ensure the cargo hold condition before loading by inspected whether the hold is ready to load the nominated cargo or not.
I have added some trial software for your survey references relate to oil calculation. The software are:
1. 7s-BunkerCal (trial software) – Password : SURVEYORS
A Bunker Tank Sounding calculation program. Bunker survey calculation for tank sounding report based on ASTM Table 54B .
Follow this link to download http://www.sevensurveyor.com/software/7s-bunkercal/
2. 7s-OilCal-T6.T54 (trial software) – Password : 123456
A Petroleum calculation program. For shipboard survey with calculation and ullage report based on ASTM Table 6 and Table 54. Actually the T6 and T54 are in separate software, but I have combine it to save time. The calculation is used for crude oil survey.
Download available at >> coming soon