Felling heavily leaning trees over water.

[woody paul]

Man pull or Tirfor

 

If it was a winch tractor get hold of them and pull and snap them off. Or do as someone posted "Through away saw" and just set fire to base and stand back at a safe distance.

[slack ma girdle]

Or this? (Although not sure if I could get front cuts in on some?)

 

You can put the mouths of this cut in from behind leaning against the trunk

[Pete Mctree]

Stolen for our american pals

 

The triangle looks like the perfect way to induce splitting of the stem. Why use it? The further the back cut progresses the more wood to cut & the greater the forces upon the wood fibres building up behind the hinge. On freegrained timber that IS going to cause massive issues

[TRADITIONAL LOGGERS]

Without a picture difficult but could use a rope down then make the cuts needed and climb back to finish.

Alternative method I have seen if licenced:- Drill a couple of holes on the trunk and use some TNT. Keep back a considerable safe distance.