Glossary: V

7 terms.

• Variation
  The angular difference between true north and magnetic north at a given location, shown on navigational charts.
• Very High Frequency Radio
  Marine radio operating in the 156–174 MHz band used for short-range ship-to-ship and ship-to-shore communications.
• Very Large Crude Carrier
  A crude oil tanker with a deadweight of 200,000 to 320,000 DWT, among the largest vessels operating at sea.
• Very Low Sulfur Fuel Oil
  Fuel oil with a sulfur content of 0.50% m/m or less, required globally under IMO 2020 sulfur cap regulations.
• Vessel Traffic Service
  A shore-based radar and communications service that monitors and manages vessel movements in a port or busy waterway.
• VHF Channel 16
  The international distress, safety, and calling frequency at 156.8 MHz; all SOLAS ships must maintain a continuous watch on this channel.
• Voyage Data Recorder
  A tamper-proof device recording bridge audio, radar images, and navigational data onto a protected capsule for post-incident investigation.