What is the difference between "baseline navigation" and so-called "aiming off"?

Or are is "aiming off" a type of "baseline navigation"?

There is an old story in my son's troop where the troop was backpacking to a train station and had to get through an opening in a fence that ran through some fairly dense woods and lay between the boys and the station. The problem was that they didn't know exactly where the break was.

So, when they got to the fence 1/2 the boys went right and half went left. Those that went one direction found the opening and headed for the station. The others kept walking and walking and walking, and at some point decided to turn around. Eventually they too found the opening, but they almost missed the train and had to literally make a mad dash for it.

I like how you present the idea. Thanks.