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Multibeam Sonars

Gemini 1200ik

The Gemini 1200ik multibeam imaging sonar is a powerful addition to the popular Gemini range. The multibeam imaging sonar offers two operational frequencies with the ability to switch between low and high frequency dependant on the user’s requirement. The 720kHz low frequency setting is designed for target identification and obstacle avoidance at long range, whilst the 1200kHz high frequency setting offers extremely detailed multibeam images, ideal for inspection at close range. Switching frequencies can be set to automatically switch over at a specific range or done manually.

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Unique to the Gemini 1200ik is the ability to maintain a 120° field of view across both frequencies: something not previously seen in any of the Gemini Multibeam imaging sonars and ensuring the target remains in view when operating at high frequency and at short range.

Significant engineering development has resulted in this latest Gemini imaging sonar offering an impressive 2.4mm range resolution as well as an effective angular resolution of only 0.12°.

Used in conjunction with the Diver Mounted Display it also provides divers with real-time imaging in low-visibility conditions via a high-resolution diver display.

The Gemini 1200ik is now available with a 350m or 1000m depth rating.


The Gemini 1200ik is a dual frequency version of the Gemini 720ik. The operating frequencies are 720kHz and 1200kHz for close inspection.

The calibration frequency guidance document can be found under the technical notices in the Resources page. To go directly to them click on the link "Technical Notices"

Alternatively, the document can be accessed here: Calibration Frequency Guidance

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