I took a dip by the shoreline and realised mechanics of swimming are slightly different. In open water navigation is aided by flow of water, viz wave which is always constant but in varying degree.
Keeping the balance of our body is the most important thing when swimming in open water, and one can do that by either floating or using basic swimming skills.
Here is a short video, in where I swam for about 100 plus meters. I intended to swim till the barricade, but my intention was thwarted by my limited skills and windy climate. It seems the dept was not more than 10 meter(30 feet) till the barricade.