For comment, a post Joe Evans made on this subject in 2020:
āā
A Y-bridle for towing, especially if attached to the tow boat near the stern, has a significant drawback. Maneuverability of the tow boat is reduced or even eliminated under load because when pulling at an angle to change or correct the heading of the tow, the pull transfers to the opposite side of the tow boat, pulling it back to straight. (the inside bridle line goes slack and all of the pressure is on the tight outside of the turn leg of the Y.)
This isn't easy to explain.
This isn't a major problem when the tow boat is larger than the boat being towed, but if of similar size or the smaller boat is attempting the tow, it can be a big problem. Unfortunately, the inability to change direction gets worse as power and pressure are increased, causing the problem just when control is needed most.
In these situations, you can usually achieve the direction change by slacking the tow line then turning the tow boat to tighten back up with the rope at an angle to the bow of the boat being towed. (kinda counterintuitive)
Make no mistake, this effect can completely stop the attempted turn, especially if trying to make headway against current.
It is important to actually use that new tow bridle before it is needed. There is a learning curve.
A smaller boat can successfully tow a larger boat and effectively maneuver with a bit of practice and understanding of the mechanics involved with a Y bridle, but there is another option.
Towing from a single point, a simple strap around the main engine, greatly enhances control of the tow. Direction changes become simple and intuitive. Pulling from directly over the prop is a game changer, IMHO.