There are occasions where a Blakes hitch will lock-up with a heavy climber. This illustration is exploring a possible counter measure. The blue loop is in a strategic spot to facilitate an easier descent. It hasn't been thoroughly tested. This serves to review it and gain experience with it.
I'm evaluating the Palomar knot as a climbing knot. There are reports of it being a strong knot. It's a bight of rope that makes an overhand knot. Once at that stage, the loop (1) sticking out is pull back on the overhand knot. A carabiner captures the doubled rope at the (3) position.
Here are the beneficial features: a) doubled rope b) no sharp radius turns c) easy to unload d) has an unique shape and ease of inspection.
Questions: i) OK for terminal use ii) to what degree has it been used and tested in the climbing worlds iii) as a mid-line attachment, is it stable (thinking about the two strands at different angles)