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We have a complete line of releasers. Choose an optimum one suitable for your needs.

The underwater releasers are mainly used for ocean observation, ocean civil engineering and fishery. In response to the needs of customers, we have line up a variety of releasers from small and lightweight releasers to releasers which are usable with large load and for a long time. To unlock the hook, there are a gas pressure system and a motor drive system to be chosen according to the application. Custom-made releasers are also available for the special orders of customers.

Underwater Releaser(MODEL-LGCTi)　　　　　　　　　　　　　　　　　　　　Releasing Mechanism：gas pressure Controller (MODEL-LC) 　【characteristic】 　・ NGK Ocean has over 20 years of experience in long-term mooring and uses a 　 　reliable gas pressure releasing mechanism, which employs our proprietary 　 　rocket pyrotechnics. 　・ You can select one call code out of the 255 codes. 　・ Made solely of titanium, Underwater Releaser MODEL-LGCTi is both lightweight 　　 and free from corrosion. 　・ This Underwater Releaser has a built-in inclination sensor. When the mooring 　　 equipment or the installer unit is tipped, a different set of response signals will 　　 be sent to the on-board Controller, enabling the operator to monitor the status. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL- LC). This program allows you to view the navigational 　　 path and automatically calculate the underwater Releaser's location. 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： 10,000m 19.6kN (2,000kgf) gas pressure 10.240kHz and 9.600kHz 9.974kHz and 9.366kHz almost perfect hemisphere call/measure distance/release φ110(body)×L780mm (air) 16.5kgf, (water) 10.5kgf oxyride batteries, lithium battery pack (service life: 1 yr) titanium alloy

Underwater Releaser(MODEL-L) 　 　　　　　　　　　 　　　　　　　　　 　　Releasing Mechanism：gas pressure Controller (MODEL-L) 　【characteristic】 　・ NGK Ocean has over 20 years of experience in long-term mooring and uses a 　　reliable gas pressure releasing mechanism, which employs our proprietary rocket 　　pyrotechnics. 　・ You can select one call signal code out of the 8 codes x 3 channels. 　・ In addition to the commands used for disengaging the hook, you can also 　　 measure the distance to the submerged unit, thus facilitating its collection. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller(MODEL-L). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater Releaser. 　・ In readiness for changes in navigational plan, which may extend the time needed 　　 for recovering the mooring equipment, you can optionally use a lithium battery 　　 pack with a service life of 2 years. 　　 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： 6,000m 19.6kN (2,000kgf) gas pressure 2 frequencies in 9.6-10.9kHz range 10.24kHz almost perfect hemisphere call/measure distance /release φ113(body)×L930mm (air) 38kg(water) 30kgf ) lithium battery pack (with standard service life of 1 yr, with option, 2 yrs) stainless steel

Underwater Releaser(MODEL-L-7ton)　　　　　　　 　　　　 　　　　　　　　Releasing Mechanism：gas pressure Controller(MODEL-L) 　【characteristic】 　・ NGK Ocean has over 20 years of experience in long-term mooring and uses a 　　 reliable gas pressure releasing mechanism, which employs our proprietary rocket 　　 pyrotechnics. 　・ The powerful body of the Releaser is capable of suspending and releasing a load 　　 of up to 7 tons. 　・ You can select one call signal code out of the 8 codes x 3 channels. 　・ In addition to the commands used for disengaging the hook, you can also 　　 measure the distance to the submerged unit, thus facilitating its collection. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller(MODEL-L). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater Releaser. 　　 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries or a　 　　　secondary battery pack 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： 6,000m 68.65kN (7,000kgf)) gas pressure 2 frequencies in 9.6〜10.9kHz range 10.24kHz almost perfect hemisphere call/measure distance/release φ113(body)×L1,178mm (air) 63kg, (water) 52kgf lithium battery pack (with service life of 1 or 2 yrs) stainless steel

Underwater Releaser（MODEL-L�U/LTi） 　　　　　　　　　　　　　　　　　　Releasing Mechanism：gas pressure Controller(MODEL-L�U) 　【characteristic】 　・ NGK Ocean has over 20 years of experience in long-term mooring and uses a 　　 reliable gas pressure releasing mechanism, which employs our proprietary rocket 　　 pyrotechnics. 　・ You can select one call code out of the 8 codes x 3 channels. 　・ In addition to the commands used for disengaging the hook, you can also 　　 measure the distance to the submerged unit, thus facilitating its collection. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL-L). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater Releaser. 　・ Made solely of titanium, Underwater Releaser MODEL-L�U/LTi is both 　　 lightweight and free from corrosion. 　・ You can optionally select to install the lithium battery pack with 3 years of 　　 service life. 　　 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： 10,000m 19.6kN (2,000kgf) gas pressure 9.6kHz and 10kHz 10.24kHz almost perfect hemisphere call/measure distance/release φ113 (body)×L930mm (air) 25kg/21kg, (water) 17.5kgf/13kgf lithium battery pack (select a service life of 1, 2 or 3 yrs) stainless steel＋titanium alloy

Underwater Releaser（MODEL-M�U/M�V） 　　　　　　　　　　　　　　　　 　Releasing Mechanism：gas pressure controller(MODEL-M) 　【characteristic】 　・ NGK Ocean has over 20 years of experience in long-term mooring and uses a 　　 reliable gas pressure releasing mechanism, which employs our proprietary rocket 　　 pyrotechnics. 　・ In addition to the commands used for disengaging the hook, you can also use a 　　 command to measure the distance to the submerged unit,thus facilitating its 　　 collection. 　・ The simple mechanism uses gas pressure to undo the hook, so the Underwater 　　 Releaser MODEL-M�U is suitable for repeated use. 　　 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： M�U/M�V 1,000m/2,000m 19.6kN (2,000kgf) gas pressure 19.2kHz and 20kHz 19.2kHz almost perfect hemisphere call/measure distance /release φ114/φ123 (body)×L805/L800mm (air) 21kg/28kg (water) 14kgf/19.5kgf) lithium battery pack (service life, 1 yr) stainless steel

Underwater Releaser（MODEL-SA） 　　　　　　　　　　　　 　　　　　　 　　Releasing Mechanism：gas pressure controller(MODEL-SA) 　【characteristic】 　・ NGK Ocean has over 20 years of experience in long-term mooring and uses a 　　 reliable gas pressure releasing mechanism, which employs our proprietary 　　 rocket pyrotechnics. 　・ The small and lightweight Underwater Releaser MODEL-SA is quite easy to 　　 handle. 　・ For a power source, both the Controller and the Releaser use alkaline 　　 manganese batteries readily available on the market. 　・ One Controller can operate up to 8 underwater Releasers. 　　　　 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： 500m 4.9kN (500kgf) gas pressure 28.5kHz 30.7kHz almost perfect hemisphere call/release φ74 (releaser)×L452mm (air) 6.5kg (water) 6.5kgf alkaline manganese (type C) batteries (4 cells); max. service life 6 mths stainless steel

Underwater Releaser（MODEL-MMC）　　　　　　　　　　　　　　　　　　　 　Releasing Mechanism : motor drive Contlroller(MODEL-MC) 　【characteristic】 　・ The small and lightweight MODEL-MMC has a motor-driven hook-disengaging 　　 mechanism. It is sturdy and can withstand repeated use in short-term 　　 operations. 　・ This model is equipped with a power switch that allows you to turn the power on 　　 and off externally. 　・ The Controller, equipped with a liquid crystal panel, displays the operating 　 　　 conditions and measured distances. If connected to a PC, you can save and 　 　　 store operation logs. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL-MC). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater Releaser. 　・ By adding an optional function, you'll be able to transmit simplified data. 　　 　【Main Specifications】 　　・Max. Working Depth 　　・Max. Releasable Load 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries 　　・Pressure Resistant Container ： ： ： ： ： ： ： ： ： ： ： 2,000m 9.8kN (1,000kgf) motor drive 20.480kHz and 19.692kHz 19.948kHz and 19.200kHz almost perfect hemisphere call/measure distance/release/set hook φ102 (body)×L677mm (air) 18kg, (water) 13.5kgf lithium battery pack (service life, 1 yr) stainless steel

Underwater Releaser（MODEL-L-G2）　　　　　　　　　　　　　　　Releasing Mechanism ：forced wire burning Controller(MODEL-LC) 　【characteristic】 　・ The electronic circuit, transducer, Releaser mechanism and batteries are all 　　 separate units, therefore you can integrate MODEL-L-G2 into any observation 　　 unit. 　・ Compared with conventional underwater Releasers, MODEL-L-G2 has 255 　　 channels of control codes. This means that you can install many Releasers of 　　 this type in a limited area. 　・ MODEL-L-G2 is small and lightweight and can be accommodated in most 　　 marketed glass or titanium spheres. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL-LC). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater Releaser. 　・ The Releaser mechanism uses a wire burn method. However, this method can 　　 be replaced by gas pressure or motor drive mechanisms to meet customer 　　 requirements. 　【Main Specifications】 　　・Max. Working Depth 　　・Signal Range 　　・Releasing Mechanism 　　・Received Frequency 　　・Sent Frequency 　　・Transmission Orientation 　　・Command Types 　　・Dimensions 　　・Weight 　　・Built-in Batteries ： ： ： ： ： ： ： ： ： ： 6,000m 10,000m wire burning 10.240kHz and 9.600kHz 9.974kHz and 9.366kHz almost perfect hemisphere call/measure distance/release/reset W185×D84×H94mm (transponder's electronic unit) approx. 0.8kg (transponder's electronic unit) battery pack (service life, 3 mths)

Controller（MODEL-LC） ■Applicable Model 　・MODEL-LGCTi 　・MODEL-L-G2 ■オプション 　・ﾘﾘｰｻｰﾎﾟｼﾞｼｮﾅｰ 　　(GPS位置表示ｿﾌﾄｳｴｱ) 　【characteristic】 　・ You can select one call code out of the 255 codes. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL- LC). This program allows you to view the navigational 　　 path and automatically calculate the underwater Releaser's location. 　　 　【Main Specifications】 　　・Signal Range 　　・Sent Frequency 　　・Received Frequency 　　・Transmission Orientation 　　・No. of Control Codes 　　・Command Types 　　・Transducer Cable Length 　　・Dimensions 　　・Weight 　　・Power Source ： ： ： ： ： ： ： ： ： ： 10,000m 10.240kHz and 9.600kHz 9.974kHz and 9.366kHz almost perfect hemisphere 255 codes call/measure distance/release/reset approx. 30m W335×D250×H200mm Releaser 10kg; transducer 11kg AC100V, DC24V (optional)

Controller（MODEL-MC） ■Applicable Model 　・MODEL-MMC ■Option 　・Releaser Positioner 　　(GPS Position Display Software) 　【characteristic】 　・ You can select one call code out of the 255 codes. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL- MC). This program allows you to view the navigational 　　 path and automatically calculate the underwater Releaser's location. 　　 　【Main Specifications】 　　・Signal Range 　　・Sent Frequency 　　・Received Frequency 　　・Transmission Orientation 　　・No. of Control Codes 　　・Command Types 　　・Transducer Cable Length 　　・Dimensions 　　・Weight 　　・Power Source ： ： ： ： ： ： ： ： ： ： 3,000m 20.480kHz and 19.692kHz 19.948kHz and 19.200kHz almost perfect hemisphere 255 codes call/measure distance/release/set hook approx. 20m W335×D250×H200mm Releaser 10kg; transducer 6.5kg AC100V, DC24V (optional)

Controller（MODEL-L） ■Applicable Model 　・MODEL-L 　・MODEL-L-7ton 　【characteristic】 　・ You can select one call signal code out of the 8 codes x 3 channels. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL-L). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater Releaser. 　　　 　【Main Specifications】 　　・Signal Range 　　・Sent Frequency 　　・Received Frequency 　　・Transmission Orientation 　　・No. of Control Codes 　　・Command Types 　　・Transducer Cable Length 　　・Dimensions 　　・Weight 　　・Power Source ： ： ： ： ： ： ： ： ： ： 8,500m 2 frequencies in 9.6〜10.9 kHz range 10.24kHz almost perfect hemisphere 24 codes (8 codes in actual use) call/measure distance /release approx. 30m W330×D225×H245mm Releaser main body 9kg, transducer 11kg AC100V

Controller（MODEL-L�U） ■Applicable Model 　・MODEL-L�U 　・MODEL-LTi 　【characteristic】 　・ You can select one call code out of the 8 codes x 3 channels. 　・ You can add the optional Releaser Positioner (software program＋GPS module) 　　 to the Controller (MODEL-L). This program allows you to view the navigational 　　 path and automatically calculate the installation site of the underwater 　　 Releaser.　　　　 　【Main Specifications】 　　・Signal Range 　　・Sent Frequency 　　・Received Frequency 　　・Transmission Orientation 　　・No. of Control Codes 　　・Command Types 　　・Transducer Cable Length 　　・Dimensions 　　・Weight 　　・Power Source ： ： ： ： ： ： ： ： ： ： 10,000m 9.6kHz and 10kHz 10.24kHz ±20° 8 codes call/measure distance/release approx. 30m W330×D225×H245mm Releaser 9kg; transducer13kg AC100V

Controller（MODEL-M） ■Applicable Model 　・MODEL-M�U 　・MODEL-M�V 　【characteristic】 　・ You can select one call signal code out of the 8 codes x 3 channels. 　・ In addition to the commands used for disengaging the hook, you can also 　　 measure the distance to the submerged unit, thus facilitating its collection. 　 　【Main Specifications】 　　・Signal Range 　　・Sent Frequency 　　・Received Frequency 　　・Transmission Orientation 　　・No. of Control Codes 　　・Command Types 　　・Transducer Cable Length 　　・Dimensions 　　・Weight 　　・Power Source ： ： ： ： ： ： ： ： ： ： 2,500m 19.2kHzand20kHz 19.2kHz almost perfect hemisphere 32 codes (8 codes in actual use) call/measure distance /release approx. 20m W330×D225×H245mm releaser 9kg; transducer 6kg AC100V

Controller（MODEL-SA） ■Applicable Model 　・MODEL-SA 　【characteristic】 　・ One Controller can operate up to 8 underwater Releasers. 　・ For a power source, both the Controller and the Releaser use alkaline 　 　　 manganese batteries readily available on the market.　 　【Main Specifications】 　　・Signal Range 　　・Sent Frequency 　　・Received Frequency 　　・Transmission Orientation 　　・No. of Control Codes 　　・Command Types 　　・Transducer Cable Length 　　・Dimensions 　　・Weight 　　・Built-in Batteries ： ： ： ： ： ： ： ： ： 1,000m 28.5kHz 30.7kHz almost perfect hemisphere 8 codes (4 codes for radius of 1,000m or less) call/release approx. 10m W440×D320×H180mm releaser 8.5kg (incl. transducer weight) alkaline manganese batteries (8 Type D batteries)

Releaser Positioner (GPS Position Display Software) ■Applicable Model 　・MODEL-MC 　・MODEL-LC 　【characteristic】 　　Optionally, you can add the Releaser Positioner to the Controller 　　(MODEL-MC,LC). It enables you to display, real time, the location of the mother 　　ship, trace line, distance to the Releaser, and the calculated location of the 　　underwater Releaser. All such data can be re-displayed by recalling it from the 　　memory. 　【Requirements】 　　・Type of PC 　　・Applicable OS 　　・CPU Requirement 　　・Ports ： ： ： ： IBM PC/AT compatible PCs　 Windows 98 or later Pentium 200MHz or above 2 RS-232C ports

SSBL (Super Short Base Line) Positioning System 　【characteristic】 　・ After they are released from the ocean bed or mid-water suspended positions, 　　 the location of mooring equipment units and OBSs can be accurately identified, 　　 thus aiding the safe and efficient recovery of these devices. 　・ In order to obtain accurate positioning data, the signal processing unit 　　 eliminates noise reflections from the ocean bed and the sea surface. 　・ In addition to the recovery of mooring equipment and OBSs, the SSBL (Super 　　 Short Base Line) Positioning System is also useful in finding the location of 　　 ROV/AUV systems and for ecological research involving whales, dolphins, turtles, 　　 and other marine life. 　【Main Specifications】 　　・Measurable Range 　　・Azimuth Resolution 　　・Measurable Distance 　　・Signal Receiver 　　・Received Frequency 　　・Power Source 　　・Data Output ： ： ： ： ±60°downward (based on experience); other ranges available upon request 1°or less (downward ±60°or less, S/N=20dB or greater) 3km or less 4 channels 10±1kHz AC100V 100VA or less through RS232C port to output azimuth/distance, etc.

　　　

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