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The Gemini NBI offers a narrow vertical
beam and 130¡Æ swathe.
The Gemini NBI produces an acoustic image,
cutting through the water with a narrow acoustic
beam and at the high refresh rate offered from
the Gemini range of multibeam sonars. Based
on the proven design of the Gemini 720i, the
Gemini NBI uses a 1¡Æ vertical beam instead of
the 20¡Æ vertical beam found on the 720i. This
reduced beam width allows the user to more
precisely identify the position of the acoustic
targets than is possible with a wide beam
imaging sonar which is commonly used for
obstacle avoidance operations.