by Agung Aang on Friday, March 20, 2009 at 11:49am
Ok, again non alike to my previous note, this time I would share material that I refers to one of published book with the title of 'Naval Architecture', indeed it's a marvelous book, small book with hard cover, unfortunately I forgot exactly the author as well as the publisher of the book (since the book has recently missing somewhere) for me the book has truly like a Naval Arch pocket book for the dummies, it's very much powerful.
I referring to one of the magic formula written within the book, the formula is a lot simple and easy to remember, but in fact its quite powerful. The formula is used to calculate instantly the Gross Tonnage (GT) figure of the Trading vessels. Talking about the Gross Tonnage (GT) figure it self, for sure you'll need this figure for various purposes, one out of it is when you are about to calculate the feasibility study of buying a second hand trading vessel and later assign and or operate the vessel for a specific project. Some of the information that you might need to structure up your project costing, are a lot related to this (GT) no, those are as listed as follows;
a. In order to get some indicative of P&I premium rate figure, both for advance and supplementary call, you will need the information of the GT of the vessel going to be applied.
b. In order to get some indicative on the berthing fee (cost) of the vessel, you will also need this GT no of the vessel.
c. Some of the various Port services fee were also based on this GT no of the vessel, i.e. Assisting Tugs fee, calling / clearance fees, Mooring fee, Immigration, Port health & quarantine (if any), etc, thus are applicable for both domestic ports and or international ports.
d. The agency fee of the vessel it self on each calling Ports are also based on this GT no of the vessel.
e. Canal passing fees are also based on this (GT) no, even though each canal i.e. Suez, Panama, etc, has their each own way in defining and determining vessel's tonnage which are differs one in to others.(however the result may vary with an average minim deviation, hence as general reference IMHO we could use still this approach )
f. etc
As aforementioned, in a certain situation where you are only about to purchase a second hand trading vessel, where in this case you do not have yet a full access toward vessel's information, you would have no other choice but to calculate your own the vessel's approximately GT No's, otherwise you might not be able to complete your desk top investment study (FS) due to lack of above mentioned cost information.
Further on, in fact as far as I noticed so far, the information of vessel's GT was very seldom to be stated and mentioned within Vessel's short specs that is stipulated within Broker's Firmed Offer. Hence to be able to proceed further with your S&P plan you will have to find and calculate your own (self predict and indicate) other missing information that you need for instant GT No.
The instant magic formula is GT (T) = (L x B x D)/125
- Where L is LBP of the vessel in Ft, whilst B is Beam molded of the vessel in Ft, and D is the Depth molded of the vessel also in Ft
- In some occasion where LBP information is not mentioned, I used to use any Length (since the result would not much different, this is such an estimated figures anyway).
- Please do not mass up the units, the formula works in British Unit instead of Metric
Though it is not a long and confused formula to remember don't you? Good luck, hopes it could be helpful for all of you…ammiieen Ya Rabb Alamin.
March '09
Tidak ada komentar:
Posting Komentar