Quay Equip.

Mean

Std. dev.

Forklifts

19

2.40

Mobile Cranes

4

1.09

Quay Cranes

3

0.89

Trailer/Chassis

14

2.25

Crawler Cranes

2

0.59

Prime Movers

3

0.92

Truck/Dozer/Trimmer

2

0.68

Total

47

Yard Equip.

Rubber-Tyre Gantry

3

1.33

Forklifts

19

2.96

Mobile Cranes

6

7.59

Straddle Carriers

2

0.54

Total

30