Types for Small and Medium Size Vessel |
Shipping Tonnage |
Size of Dependable Ball(D×Lm) |
Remarks |
50 |
0.5×1.0 |
Fisher |
100 |
0.7×1.5-1.0×1.5 |
Fisher |
200 |
1.0×1.8-1.0×2.0 |
Fisher,Tugboat |
300-500 |
1.2×2.0-1.5×2.5 |
Fisher,Tugboat |
1000 |
1.5×2.5-1.5×3.0 |
Tugboat,Transport vessel |
3000 |
2.0×3.0-2.0×3.5 |
Ocean dragnet vessel,Transport vessel |
10000 |
2.0×3.5-2.5×5.0 |
Transport vessel |
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Type for Large-Size Vessel |
A Vessel(DWT) |
B Vessel(DWT) |
Assumed String Meeting Velocity(m/s) |
Effective Movement Energy(KJ) |
Size of Dependable Ball(D×L) |
300,000 |
200,000 |
0.15 |
1230 |
3.3×6.5 |
150,000 |
0.15 |
1030 |
3.3×6.5 |
100,000 |
0.15 |
781 |
3.3×6.5 |
200,000 |
150,000 |
0.15 |
882 |
3.3×6.5 |
100,000 |
0.15 |
693 |
3.0×6.0 |
85,000 |
0.15 |
618 |
3.0×5.0 |
100,000 |
85,000 |
0.17 |
617 |
3.0×5.0 |
50,000 |
0.18 |
511 |
3.0×5.0 |
40,000 |
0.2 |
544 |
3.0×5.0 |
50,000 |
40,000 |
0.2 |
425 |
2.5×5.5 |
30,000 |
0.22 |
437 |
2.5×5.5 |
20,000 |
0.25 |
443 |
2.5×5.5 |
20,000 |
15,000 |
0.27 |
318 |
2.5×4.0 |
10,000 |
0.3 |
309 |
2.0×3.5 |
5,000 |
0.35 |
253 |
2.0×3.5 |
10,000 |
5,000 |
0.35 |
212 |
2.0×3.5 |
3,000 |
0.4 |
196 |
2.0×3.5 |
1,000 |
0.5 |
127 |
2.0×3.0 |