Dataset:  ship_speed_fuel.csv

Source: S.Wang, Q. Meng (2012). "Sailing Speed Optimization for Container
Ships in a Liner Shipping Network," Transportation Research Part E, Vol. 48,
pp. 701-714

Description:
Measurements of average speed (knots) and fuel consumption (tons/day) 
for 5 ship-type
and voyage leg combinations. 20 runs for each combination.
Ship Type/Voyage leg:   (TEU = 20-foot equivalent unit)
1: 3000-TEU   Singapore-Jakarta
2: 3000-TEU   Singapore-Kaohsiung
3: 5000-TEU   Hong Kong-Singapore
4: 8000-TEU   Yantian-Los Angeles
5: 8000-TEU   Tokyo-Xiamen
Authors Fit Power Model:  Fuel = a(speed^b)   
or equivalently:        ln(Fuel) = ln(a) + b(ln(speed))
Polynomial fits well too.

Variable Names
ship_leg    (1-5)
speed   (knots)
fuel    (tons/day)