Table 18. Tabular results from varying icebreaker escort rates for
Noril'sk multipurpose cargo ship transits.
Total cost ($)
Icebreaker cost
Simple
Model
Difference*
Linear fit to
($/day)
prediction
results
(%)
model results
April transits
2000
432,021
440,414
1.94
3000
454,021
461,639
1.68
4000
476,021
485,376
1.97
TC = 21.810 (IBR) + 396,808
r2 = 0.9995
6227
525,015
532,124
1.35
7000
542,021
549,813
1.44
(see Fig. 14a)
8000
564,021
569,077
0.90
9000
586,021
594,768
1.49
August transits
6000
247,741
252,472
1.91
7000
251,741
256,367
1.84
8000
255,741
259,986
1.66
TC = 3.310 (IBR) + 233,166
r2 = 0.9775
8286
256,885
261,980
1.98
9000
259,741
262,533
1.08
(see Fig. 14b)
10000
263,741
264,985
0.47
11000
267,741
270,081
0.87
*See Table 17.
650 x 103
Modeled Results
600
550
Linear
Fit
Eq. 5
500
450
400
10 x 10 3
2
4
6
8
Icebreaker Rate ($/day)
a. April transits.
280 x 103
Modeled Results
270
Linear
Fit
260
Eq. 5
250
240
12 x 10 3
10
11
5
6
7
8
9
Icebreaker Rate ($/day)
b. August transits.
Figure 14. The effect of icebreaker rates on total shipping costs.
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