The Kraken ThunderFish® is a highly advanced, 6000 meter rated, Hovering Autonomous Underwater Vehicle (H-AUV). The ThunderFish® AUV program development began in 2014 with a mission to create a more versatile and compact vehicle that is easier to handle than existing systems, while providing more space for payloads, and fast turn-around times.


ThunderFish® Alpha is Kraken’s Mid-Sized Autonomous Underwater Vehicle and the first platform in the Thunderfish series of vehicles.  Versatile payload options and a modular battery system allows to ThunderFish® Alpha to be adaptable to many different AUV missions of varying depths, duration, and applications.

Dimensions (L x W x H) 3.50 m x 0.95 m x 0.50 m
Hull Design Wet Flood, Syntactic Foam Fairing
Hull Frame Titanium
Dry Weight 675 kg Vehicle / Batteries 750 kg w/Sensors
Wet Weight +5 kg – Positively Boyant (including 10 kg emergency drop weights)
Depth Rating 1,000 or 6,000 meters
Self Righting Yes
Payload Capacity 75 kg
Motors Twin Brushless DC Thruster Motors
External Connections Power, Ethernet, WiFi
Data Storage 4 TB hot swappable Data Pod

The ThunderFish® Alpha AUV is offered in two depth ratings of 1,000 or 6,000 meters, and is equipped with state-of-the-art sensor systems, including Kraken’s AquaPix® MINSAS sonar and SeaVision® 3D Laser Scanner. Other sensors include obstacle avoidance sonars, multi-beam echo sounder and advanced navigation/positioning sensors. It incorporates pressure-tolerant battery technology from Kraken Power GmbH, optional Kraken DataPod data storage modules and a distributed control system architecture. This allows the AUV to quickly complete survey missions, offload survey data, enable efficient integration of additional payloads and provide more battery capacity for increased operational endurance.

Top down view of the THUNDERFISH AUV showing vertical thrusters for hovering capability.

THUNDERFISH Alpha trials in St. John’s, Newfoundland in June 2017. Picture shows MINSAS 60 – 6,000 meter rated Synthetic Aperture Sonar.

Internal architecture of THUNDERFISH ALPHA 6,000 meter rated AUV.