CER(Commercial Efficiancy Rating) is a rough estimate of the profitability of a ship.
(Net tonnage* Jump#)/Cost= CER
Net tonnage consists of all Passenger space and cargo tonnage.
A CER of less than 3 is unprofitable even in speculative trade.
A CER of 3 to 5 can consistently turn a profit from speculative trade
A CER of 5 or more can reliably turn a profit at the common-carrier rate of Cr 1000/ton.

Ship Type
Tonnage
CER
Ship Type
Tonnage
CER
Hiragash
10000
6.51
Grotian Black Ship
7000
6.04
Yaster+20000 dtons
30000
13.64
Rngling+4333 dtons
8333
10.49
Gukasei+4000dtons
6000
6.67
Soon+1400 dtons
2800
4.28
Flit Heavy Merchant
2000
3.09
City+250 dtons
1500
5.87
Princess
1500
2.62
Glory
1250
1.58
Desmii
1000
3.50
Hermes
1000
4.92
Race
1000
3.98
Rachet
1000
2.30
Hind
800
2.52
Neg'vaghr
660
4.04
Neg'vahgr TBT
660
2.20
Dash
500
3.14
Fun
500
3.76
Trieste
500
3.77
Ynng
500
2.73
TBT Commerce Cruiser
400
1.21
Hordish
400
3.49
TBT Lowberth Liner
400
1.25
Subsidised Merchant
400
3.63
Grotian Clan Trader
300
3.84
Jariaz
200
2.19
Far Trader
200
4.33
Free Trader
200
3.09
A177.25
177
0.80
Scout Type S
100
0.52
Seeker Type J
100
0.26
Basic
100
3.38
Traveller
800
3.40
Jerico
400
3.19
Koola
400
3.40

 © 2003-2007, Alan Spik, The brother of a genius!
Traveller is a registered trademark of Far Future Enterprises.