The shallow water anchor is found on almost every fishing boat in North America! In France, it is only beginning to be known, although it is a very practical improvement!
The shallow anchor

Speed of deployment

Anchor on the shallows

A silent anchor
Several solutions, such as the traditional anchor, which is a weight connected to a rope or chain, or using the anchor function of the electric motor, allow the boat to be kept in position. However, these solutions are noisy and/or energy consuming. The shallow anchor allows to anchor with more discretion.
The advantage of having two anchors
This system is very practical, but it makes sense to use two anchors! The problem with using only one anchor is that the boat will turn at the slightest current or wind. With two anchors, the boat remains stable, whether facing the current or during strong winds. The only problem with installing two anchors is that it almost doubles the cost of the installation.
The price
This anchor is a comfort that has a non-negligible cost, with a price that starts in the 2,500 euros. A price that includes the material to operate it, such as the hydraulic pump and a remote control. Moreover, this improvement is reserved for large boats, because not all boats can receive this additional weight that is fixed on the transom, next to the engine.
Some references
Power pole is probably the brand that popularized this type of anchor. Recently, Minn Kota, with its Raptor model, offers a similar product.

This anchor is not just a simple gadget, but is a real asset. It is a great improvement for equipping a boat, especially for prospecting, when you want to keep mobility and be able to stop the boat quickly.