Prerequisites
- Known steering course and speed through water — or target COG with current
- Current from atlas, tidal stream or experience
Step 1: What is given?
Often you know compass/steering course and STW (kn) and want COG with current. Or you plan COG and need steering course.
Step 2: Triangle in NauticCalc
Open Current correction. Enter set (direction current flows to) and drift (speed).
Step 3: Sanity check
Stronger beam current → larger offset. Recompute after current changes.
Step 4: Full course chain
For the full flow see Course correction.
Read next: Blog: current triangle · Course correction