HOME > Technical Note > Underwater Releasers

　Main Features of NGK Underwater Releasers
High Reliability
   Recovery Rate: 95% or more

 Easy Operating & Mechanism
   Only pushing one or two buttons, then open the
   hook within few seconds

 Good Cost Efficiency
   Machine Life: 10yrs or more*1
   Consumable parts: Gas Generator and Battery

 Many Variations
   From shallow to most deepest ocean
   Light duty(payload 500kgf) to Heavy duty (payload 7000kgf)

*1: not meaning the mooring period. Mooring term is 6, 12 or 24 months according to the type.
　High Reliability : Recovery Rate:more than 95%

=Representative of Clients=

　　Science：
　　　Univ. of Tokyo
　　　Hokkaido Univ.
　　　Nagoya Univ.
　　　Kyoto Univ. ・・・

　　Fisheries:
　　　Hokkaido National Fisheries Res. Inst.
　　　Seikai National Fisheries Res. Inst.
　　　Japan Sea National Fisheries Res. Inst.
　　　Seikai National Fisheries Res. Inst. ・・・

　　Over Sea:
　　　Osro Univ.
　　　Unter Wasser Technick
　　　Alcatel Submarine Network
　　　Limnological Inst. (Siberia Div.) ・・・


Marine Civil Engineering:
　Penta-Ocean Construction Co.,
　Yorigami Maritime Construction Co.,
　Shimizu Construction Co.,
　Taisei Construction Co., ・・・

 Coast Guard:
　Port and Airport Res. Inst.
　Japan Coast Guard

 Submarine-Cable Network Company:
　NTT Group, KDDI Group
　Easy Operating & Mechanism：only pushing one or two buttons,then open the hook within few seconds

　Good Cost Efficiency Machine Life:10yrs or more/Consumable parts:only Gas Generator and Battery
　Application
　Many Variations:From shallow to most deepest ocean Light duty(payload 500kgf) to Heavy　duty
　(payload 7,000kgf)
　Specification
SA M MC New-L L-7
Max. Depth(m) 500 1,000 2,000 10,000 6,000
Max. Payload(KN) 4.9 9.8 9.8 19.6 68.6
Acoustic Frequency
                     (kHz)		 28.5
30.7		 19.2
20.5		 19.2
20.5		 9.3
10.2		 9.3
10.2
Dimension(mm) Dia.74
X452		 Dia.102
X680		 Dia.102
X680		 Dia.110
X800		 Dia.113
X1178
Weight(kg in air) 6.5 16 18 17 63
Weight
         (N, in water)		 54
(5.5kg)		 130
(13.2kg)		 132
(13.5kg)		 137
(14.0kg)		 510
(52kg)
Material SUS304 Ti-Alloy SUS304 Ti-Alloy SUS304
Mooring Life 6 months 12 months 12 months 24 months 12 months
Power Supply LR14 Li-Battery Li-Battery Li-Battery Li-Battery

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