Side arm casting (I call it sling casting) on or near the horizontal plane is a MUST cast to learn and become proficient at. Here are some of the uses that I have for it:
- when two or more people are fishing from a boat in windy conditions
- casting to reposition the fly quickly
- casting "under" the wind
- casting "under" the shore obstacles, overhangs etc.
- casting "left or right lies" this is an alternative to mend and/or reach casts, very usefull on smaller streams and with long leaders. Think of the figure 8 action on the line and you can see that the fly can land either to the right or left of the fly line. All you do is flick your wrist R or L at the end of the last fwd stroke.
I don't have enough SW experience to comment about using this on a beach situation but I know I used these casts last time I was out there, from a boat and from shore.
Others can chime in...
Pete AKA Frenchcreek from Calgary