Many of us use Boat Scenario

I use Sail Replay on a Mac.  Free and easy.

I use tss.

Hi John,
For my articles I use boats.exe program which you may download for free from https://boats.sourceforge.net/

You may also find my quick 'how to use' article on my web site at the bottom of the home page under my Appendix A How to create diagrams.

To find my site, google Johns RC sailing rules and tactics

John
.

Thanks for your replies, I use Windows so Sail Replay is out and Boat Scenario looks the best option as tss has a purchase cost Euro 60.

What makes a lot of online diagramming tools unusable is a lack of by-the-lee support. As soon as a boat goes one degree past DDW, they automatically jibe. This isn't how our most popular classes (Optis and ILCAs) work, as one can sail well past BTL without jibing, and often do as part of their optimal speed technique.

However, SailTalks.com lets you set your boat's jibe angle -- e.g., one degree for a sloop (main and jib) or 30 degrees for a cat boat (mainsail only). Plus a bunch of other features like animated diagrams, saved scenarios, link sharing, live collaboration, etc.

Boats Scenario is one good option.