Portland plotter trainerFree from learntosail.io ↗
5204₂8₄166₃2421223₁3111★030060090120150180210240270300330VAR 2°W (2026)Kestrel Head LtFl(2) 10s 42m 18MChurch spireHarbour pierheadOc G 4sKestrel FairwayLFl 10sNo 3Fl G 5sNo 4Fl R 5sMewstone LedgeQ(3) 10sMewstone (dries 1₂)OutfallFl Y 5sWreckShamblesQ(6)+LFl 15sKESTREL BAYPractice chart · fictional · depths in metres30′30′31′31′32′32′33′33′34′34′35′35′36′36′37′37′38′38′39′39′40′40′1°55′W1°55′W57′57′58′58′59′59′2°00′W2°00′W1′1′2′2′3′3′4′4′2°05′W2°05′W6′6′7′7′8′8′2°10′W2°10′W50°N1.7 nm
True index067°T
Var 2°W index069°M
Grid not square: turn the dial (to measure) or the whole plotter (to lay off)
Plotter
Dial
  • Move the plotter by its clear base; it settles onto marks.
  • Swing it by a white end handle; it pivots on the other end.
  • Turn the dial by dragging it, or with the dial buttons.
  • Dividers: drag a point to open them, the brass hinge to carry them.
  • Keyboard: arrows move, [ ] swing, comma and full stop turn the dial.
  • Zoom with + or a double-click, then drag the chart to pan.