Percival

Marine Logbook - Voyage & Fix Logging: Records position fixes, averaged speed, course, and timestamps over the course of a passage. - Observations & Voice Notes: Allows sailors to record voice memos and text notes tied to specific GPS fixes. - Noon-to-Noon Calculations: Calculates traditional passage-making metrics, such as 24-hour day runs (noon-to-noon) and daily distance made good. Live Navigation Instruments - Displays passage data including averaged Speed Over Ground (SOG), Course Over Ground (COG), Velocity Made Good / Velocity Made on Course (VMG/VMC), and range/bearing to destination. - AIS & NMEA Integration: Ingests marine NMEA 0183 data streams and AIS vessel feeds (both local NMEA feeds and internet AIS) to monitor surrounding vessel traffic. ETA windows - Computes ETA estimates based on three velocity calculations. Mapping - Map Views & Waypoints: Plots the voyage track, note markers, and live positions over map layers (including NOAA charts and satellite tiles). Sharing & Passage Data - Standard & Native Exports: Exports trips in standard formats (.gpx, .csv) as well as native Percival voyage backup files (preserving tracks, notes, and voice clips) to share with other crew and sailors.