Time to Go (TTG)
The estimated time remaining to reach the next waypoint or the final destination based on the current Speed Over Ground.
Bridge-use context
TTG is useful only when the waypoint, speed source and planned route are clear. Watchkeepers use it to compare the live voyage with the passage plan, update ETA messages and spot when current, traffic or speed orders are pushing the ship away from the expected schedule.
Use this reference together with the linked article and calculator pages. A term page should answer the immediate definition, then point the reader toward the workflow where the value is checked, recorded or challenged during a real watch.
Operational checks
- Confirm whether SOG or speed through water drives the estimate.
- Recalculate after every waypoint change or speed order.
- Compare TTG with ETA and required arrival windows before reporting externally.
Related bridge checks
CaptainCalc calculates precision navigational and stability parameters natively on your device without an internet connection.