Disambiguation
"Wind Focus"
There is no item called "Wind Focus" in OSRS. You are likely confusing two different ship upgrades.
Did you mean?
Wind Catcher
Tier 2 Sail Upgrade for speed.
Teleport Focus
Facility for ship teleportation.
1. Wind Catcher
If you are looking for the upgrade that makes your ship go faster, you mean the Wind Catcher.
It is a Mast Upgrade that increases speed by 15%.
Read the Wind Catcher Guide →2. Teleport Focus
If you are looking for the facility that lets you teleport around the map, you mean the Teleport Focus.
It is a Medium Facility that requires Magic logs to build.
Read the Teleport Focus Guide →