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Ch30-H8070.fm Page 342 Wednesday, October 18, 2006 11:15 AM
342 Ship Construction
TABLE 30.1
Compensated Gross Tonnage Coefficients

Type Coefficient

Cargo under 5000 tons dwt. 1.60
5000 tons dwt. and over 1.00
--- ใช้เพื่อการศึกษาเท่านั้น---
Passenger cargo 1.60
High speed cargo liner 1.60
Container ships 1.90
Tankers under 30 000 tons dwt. 0.65
30 to 50 000 tons dwt. 0.40 วี
0.50
งานห้องสมุด ศูนย์ฝกพาณิชย์นา
50 to 80 000 tons dwt. 0.45
80 to 160 000 tons dwt.
160 to 250 000 tons dwt. 0.35
Over 250 000 tons dwt. 0.30
Multiple purpose (all sizes) 0.80
Bulk carriers (incl. ore/oil) 30 000 tons dwt. 0.60
30 to 50 000 tons dwt. 0.50
50 to 100 000 tons dwt. 0.45
Over 100 000 tons dwt. 0.40
Refrigerated Cargo ึ 2.00
Fish factory ships 2.00
Gas carriers and chemical tankers 2.20
Passenger ships 3.00
Ferry boats 2.00
Fishing vessels and misc. vessels 1.50

As an example a 65 000 gross tonnage passenger ship would have a com-
pensated tonnage of 195 000 and a 150 000 gross tonnage oil tanker
(312 000 tons deadweight) a compensated gross tonnage of 45 000.

Further Reading

‘International Conference on Tonnage Measurement of Ships, 1969’ IMO
publication (IMO-713E).