Updating the drone will not matter , the best way to get low is not to hover but to fly over decreasing your alt and paying attention to your speed, Notice how we do it with the rescue Jacket and just skim the water , you cannot do it hovering.
The longer you hover the more chance of a forced landing.
52 Seconds into the video you can see how we stay low. You can skim the water also but we recommend the Rescue Jackets as you can get away with a lot.
Phantomrain.org
Gear to fly in the Rain and Land on Water.
We also have a video for the
Air 2 but this shows how to effectively fly low across the water without a forced landing..