Shore lines

[BabaYaga]

The normal practice (when securing around rock) is to a use short length of chain.

I was rather thinking of chafe on a rope that passes other stones or rocks on land or in shallow water before reaching deeper water. Of course, it all depends on what the shore looks like and where a suitable rock to secure to can be found.
But there is a lot af movement in a long nylon line, especially with shifting loads and directions.

 

[Roberto]

In case one needs a way of releasing the shore line from the boat without risk of snagging or fraying tens of meters of rope against rocks (or damaging the tree bark if tied to a tree), is to use this arborist device, fausse fourche in French, "cambium saver" seems to be suggested by Google as the English language term:
a piece of webbing with two different diameter rings at the extremities, and a short lanyard with a small plastic ball. The ball can pass through the bigger (white) ring, but not through the smaller (yellow) ring. The webbing can be made of whatever strength/material one deems necessary.
This "sling" is passed around the rock or tree, the mooring rope comes from the boat, is threaded through the two rings and goes back to the boat (so a double length is needed). When one needs to let go, the lanyard +ball is tied to one end of the mooring rope, which is then let free, one then begins to pull the other half of the rope: the ball arrives to the white ring, passes through it freeing the sling from the rock, the ball is then stopped at the small/yellow ring which allows the whole system to be recovered on board.
A **lot** quicker to release everything in case one needs to hurry up and above all no need to go ashore nor cutting any rope; if the ball lanyard is made small enough that can give additional insurance in case of (very unlikely) snagging of the webbing, just pull hard enough to break the lanyard, the mooring rope can be recovered and a piece of webbing+rings is left ashore.

 

[noelex]

I was rather thinking of chafe on a rope that passes other stones or rocks on land or in shallow water before reaching deeper water. Of course, it all depends on what the shore looks like and where a suitable rock to secure to can be found.
But there is a lot af movement in a long nylon line, especially with shifting loads and directions.

This is not normally an issue. The shore attachment (to a rock or tree) is often well above the waterline, as is the attachment at the boat end. In addition, normally a fender will be attached at the midpoint for visibility and this will prevent the line sinking, even if there is no tension.

Typically the system is under reasonable tension even in light winds (unless your anchor is "creeping"). If you consider chafe may be an issue on shoreline rocks then using a short length of chain will solve this issue, but generally the shore line does not sink significantly below the surface. However, we always use chain when securing around rocks.

When tying to shore in a remote anchorage the first step is simply to temporarily secure the stern. At this stage chafe etc is not an issue. Once the stern is temporarily secured there is plenty of time to secure the stern correctly, ensuring adequate chafe protection and (preferably) two or more lines. We have occasionally broken some impressive shore side rocks when subject to beam winds, so a back up stern line is sensible. Multiple stern lines will also help to stabilise the stern location if other boats are nearby.

Note this is referring to shore lines in a remote anchorage, not Med mooring to a pier.

 

[BabaYaga]

This is not normally an issue. The shore attachment (to a rock or tree) is often well above the waterline, as is the attachment at the boat end. In addition, normally a fender will be attached at the midpoint for visibility and this will prevent the line sinking, even if there is no tension.

I agree with everything you say, but my comment on the risk of chafe on the rope was made with regard to the OP's proposed idea with a kind of 'Bahamian moor', where one of the anchors is replaced by a rock or tree on the shore.
In this case, as I understand it, the shore line is not attached to the boat but to the anchor chain on the sea bed (or at least well below the keel depth).

 

[Neeves]

For tying to trees we would use a few turns of rope round the tree, to protect the tree. We also carried (recall I'm weight conscious ) lengths of chain, as mentioned, for the rocks (with spare shackles). Another option is carry some reinforcing bar (or pitons), hammer into cracks and tie off - very common in Tasmania.

Usually you are using shore lines for specific wind events (or the winds are light, thus don't matter, and you are trying to create more room for other yachts in a tight anchorage). If its a specific wind event you need to make a punt on the actual direction and then 'anchor' based on that guess. You might not get it quite right, its a forecast not a certainty, but it will be good enough - and if you are using the rode and 2 other ropes, off the transom - you will have the ability to make some changes. However you will tend to be secured stern to shore and anchor 'out', its the obvious way and overcomes this fear of anchoring 'downhill' and your transom will be exposed to the wind.

Jonathan