Answer:
On a ship, the crow's nest is a small platform high up on the mast, where a person can go to look in all directions.
So the phrase, " When I wasn't in the crow's nest could have many different interpretation, depending on the way you look at it. My interpretation of the phrase is that you can see all directions in the crows nest of a ship. When you aren't in the crows nest you can't see all directions. So the crow's nest could symbolise you didn't know where you were going or what you were doing something in life for. In addition, it could syblolise you were blind to your surroundings or you had no purpose in life. These are jyst a few interpretations I have of the phrase but obviously, everybody's interpretations are different.