It depends what you are hiding from. If you want to avoid notice from random encounters, you would want to head out to sea. So long as you’re over the horizon from any shipping lanes, you’re as close to invisible as you can get.
If your goal is to evade an active military search, you want clutter, and a lot of it. Military radar can sweep vast areas quickly. Satellites can spot ships at sea, so long as the sky is clear enough. Islands and coastline can mess with these however. Get into an out of the way bay, and throw up camo netting, and your ship is now just another bit of rock to the satellites, and it’s part of the noise to radar. The cost of this cover is that it is also attractive to random tourist boats, or fishing boats.