This means that the camera has been developed specifically to be immersed in the water below one meter (a little more than a yard) and will not fail if thus immersed. Lastly, the camera needs to have an IP68 rating. Be aware too that water largely blocks infrared light, and so infra-red cameras won’t be able to see as far as those which focus on visible light, especially in the blue end of the spectrum. Third, the camera needs to have a large camera aperture and large pixel resolution. Natural rubber needs to be thus avoided, and all of the waterproofing on the unit needs to be made of silicone or other similar synthetic materials. Second, the line and camera must be insulated with cold-tolerant materials which will not become brittle when exposed to below freezing temperatures. Fortunately, they produce their own heat when running, so as long as the camera has insulation around the battery, it will function properly at cold temperatures. LiPo batteries that get too cold can have water condense inside of them, causing them to short out and catch fire, so it’s important to keep them reasonably warm. So what should you look for? The first thing would be insulation of some sort for the unit itself and especially the battery. Many units are too cheap or too simple to be useful or are ill suited to the extreme weather conditions inherent in ice fishing. This doesn’t mean that all underwater cameras are made equal, nor that fishermen can rely on getting a good one without learning anything about them. They are easy to carry and can be set up in seconds, enabling fishermen to quickly drill a test hole, take a look around, and then either expand or abandon the hole based on what he sees. Such cameras can also prevent a fisherman from spending hours out on the ice dropping lines where there are no fish, as well as alert them to the presence of obstacles and hazards that would snag and ruin their lines. Underwater cameras are becoming a necessary piece of equipment for any serious ice fisherman, especially those who want to optimize their catch. Ice fishermen can also see much further underwater than those who are fishing in active waters, since the lack of wave action and cold water combine to make the water extremely clear, enabling cameras with lights to show off a very large area and even highlight fish as they wait out the winter. This means that small “test holes” can be drilled to see if an area is worth fishing before fishermen drop their lines. The use of underwater cameras is especially useful in that the cameras are designed with the ability to fit into holes much smaller than is required for fishing. Since ice fishermen must put time and effort into each hole they drill and each line they drop, knowing exactly what is below before they drop their lines is crucial. While they have become popular with lake and littoral fishermen who want to observe underwater hazards and fish populations to better understand their favorite fishing spot, underwater cameras have proven to be the most useful to ice fishermen. Smaller and with simpler options than those on the large commercial units, these underwater cameras have evolved to be inexpensive, easy to deploy, and capable of functioning without being continuously connected to a boat’s power system or on-shore power source. The advent of small, inexpensive digital cameras in the late 90s made it possible for sport fishermen to begin purchasing and using such cameras. Underwater cameras were used by the commercial fishing industry to confirm the presence of underwater obstacles that would wreck ships or foul nets. Since most open water, especially ocean water, is opaque due to suspended particles and living organisms, the ability of cameras to provide useful information is limited. However, these commercial units were large, heavy, expensive, and very limited in their capabilities. Underwater cameras have been used in commercial fishing for decades, primarily as a means of providing visual confirmation for sonar data or environmental observations.
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