I looked around at most of the units available. I like the Airmap 2000c for a number of reasons. I purchased the International version while on holidays in the USA. It cost me $795.00 US dollars that converted back us Aus $1030.00. The same unit in Australia sells for about $1700.00. It came with the latest Jeppesen Charts and the Terrain awareness for most of the world and has a base map of the world. The maps of Australia are about 50 years old but the details are still good enough to be able to fly to most area with ease. You can put your own way points into the unit, so if the map is incomplete you can still use the unit to get to where you want to go. The screen is big enough but not to big to fit most Ultra light panels. You can buy a docking station for the unit that allows for easy removal.
The unit that I would have liked is the Avmap, but with a price tag of around $2200.00 I could not justify the increased outlay.
I am still finding different ways to use the unit with it many types of screens, from full maps to split screen to HSI and the Terrain with Airspace displays, very good when you are flying near controlled airspace. It will pop up a screen to alert you that you are about to enter the controlled airspace. It also has a graphical section with the relevant height restrictions for the area a head. When flying with most of the displays the terrain awareness will turn the areas in your flight path red if your height is lower than the object or area that you are flying towards.
With the push of two buttons you bring up the entire registered air strip in the Ersa that are close to your locations (very good in the case of an emergency). And then set up a navigation track to that air strip.
The Airmap is supplied with a list of extras, it comes with an external antenna, yoke mount, 12 volt power cord, suction cup mount, plastic cover and the Map Create program (Very detailed maps of the USA. good if you live in the USA). The unit has 4 AA batteries but they will only last about 2 hours, good for setting up the unit in the lounge chair before take off, so they recommend that the external power cord be used.
The colour screen is easily seen in day light.
You can also purchase Marine navigation charts and just insert the card into the unit and then use it in the boat. It is water resistant (to a depth of 1 mtr for thirty minutes I think).
So far I am impressed with unit. It has not let me down yet.
I have seen other units like the Enigma that has a map and flight and engine monitoring all in the one unit. I personally like to have a separate unit so as not to be changing screens all the time to monitor maps and engine.
On the Lowrance web site you can down load a simulator and tyr some of the fearture on your computer before you make up your mind.
Hope that this has helped you.
Here are some of the different displays
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