Select the scale of the pneumatic fender according to the above table, and the principle is that one pneumatic fender can absorb all the impact energy. If 2 to 4 pneumatic fenders are used on one side of the ship’s side, the safety guarantee is higher. The diameter of the pneumatic fender should not be too large. Excessively large pneumatic fender diameter will increase the gap between the side of the ship and the wharf, which is not conducive to the loading and unloading of personnel and cargo. The following table can be used as a reference for small and medium-sized ships and large oil tankers to choose pneumatic fenders.

Small and Medium Ships
Tonnage and type of ship	Pneumatic Fender Dimensions (DxL)
100t fishing boat	0.7×1.5-1.0×1.5
200t fishing boat	1.2×1.8-1.2×2.0
300t-500t trawler	1.2×2.0-1.5×2.5
1000t trawler	1.5×2.5-1.7×3.0
3000t trawler, carrier	2.0×3.0-2.0×3.5
10000t Northern Fishery Mothership	2.0×3.5-2.5×5.0

Large Oil Tanker
A tanker (DWT)	B Tanker (DWT)	Assumed speed on board (m/s)	Effective motion energy (kj)	Pneumatic Fender Dimensions (DxL)
300000	200000	0.15	1230	3.3×6.5
	150000	0.15	1030	3.3×6.5
	100000	0.15	781	3.3×6.5
200000	150000	0.15	882	3.3×6.5
	100000	0.15	693	3.0×6.0
	85000	0.15	618	3.0×5.0
150000	100000	0.15	626	3.0×5.0
	85000	0.15	564	3.0×5.0
	50000	0.18	573	3.0×5.0
100000	85000	0.17	617	3.0×5.0
	50000	0.18	511	3.0×5.0
	40000	0.2	544	3.0×5.0
50000	40000	0.2	425	2.5×5.0
	30000	0.22	437	2.5×5.0
	20000	0.25	443	2.5×5.0
20000	15000	0.27	318	2.2×4.5
	10000	0.3	309	2.2×4.5
	5000	0.35	253	2.2×4.5
10000	5000	0.35	212	2.2×4.5
	3000	0.4	196	2.0×6.5
	1000	0.5	127	2.0×3.0