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Convert nautical units

NauticCalc on iPhone — matching the topic of this article.

NauticCalc app screenshot

Prerequisites

  • NauticCalc installed — no network required

Step 1: Find converters

Open Nautical conversions: speed, distance, Beaufort, temperature, depth.

Step 2: Typical cases

  • kn → km/h for crew ashore
  • nm ↔ m for ETA distance
  • Beaufort for rough wind allowance

Step 3: Stay consistent

Use the same units (nm, kn) in ETA and logbook.

Read next: ETA guide · Features