The only way out

Watercolor, 2017. Devil's Island, somewhere in the Pacific Ocean.
This is an island which you don't want to be stranded on.
Only the clouds on the horizon reveals the main land.
It's about 38 km, but the currents will bring you there in about two days.
The tricky part is just to find a way out from this island, past the roaring breaking waves.
The water is never calm around Devil's Island.
It's something to do with the currents around here.
If you don't have a really good boat and captain and happen to be stranded here,
the bay in these paintings is the only way out.
It's called a "horse-shoe formation".
The waves have nowhere to go but to crash into the caves and the high walls. 
According to unverified information every 7th wave crashes hard enough to trigger a "counter-wave" which is strong enough to bring you out on the open sea.
The trick is just to know which one...
It's a bit tricky and a bit risky.

Hope you like it!