Join Date: Dec 2014
Location: Northern California
To expand a bit on what bender said - the anchor is what makes a spey cast a spey cast. It’s generally defined as the part of the line (and its direction) touching the water when you cast - most specifically just before you do the forward stroke. It holds things together when you throw back your loop. Too much “stick” (friction of the water against the front of the line) and it takes away the energy from your forward cast, too little and you can “blow” your anchor - in other words when you throw back your D-loop it comes unstuck and ruins your cast. There is a whole range of anchor types of course, from deeply sunk fast sinking sink tips to delicate floating line setups with nothing but a light tapered mono leader and perhaps even a floating fly. Each requires adjustment in how you cast to get things right. While it depends a lot on what you are used to, generally speaking most people find the extra stick you get from a half-sunk sink tip is more forgiving for a beginner, but whatever the style of setup there are pitfalls for too little and too much anchor. But for the SH situation described by the OP it’s all about making the cast work with the minimal stick due to the anchor being formed with a slender leader, and possibly part of the end of a slender fly line.
Really skilled casters like Frimor can have the touch to make it look almost like magic, where there is just a tiny bit of stick and exactly the right amount of line acceleration to make everything hold together and work.
“Gravity is a harsh mistress!”, The Tick