This video defines Quadrantal Notation, why it is a necessary part of Plane, Middle Latitude and Mercator Sailings, and how to determine Course Angle (C) using the tanC formula and then converting Course Angle (C) to Course (Cn) that you would give to your helmsperson. The last two minutes show how to convert Cn to C
00:00 Introduction
01:50 tan C, p and l
04:08 SE Quadrant
7:00 SW Quadrant
07:45 NW Quadrant
08:28 NE Quadrant
09:00 Course Angle (C) defined
10:30 Course (Cn) defined
11:37 Quadrantal Notation for SE, SW, NW & NE quadrants
12:56 Converting C to Cn
16:00 Converting Cn to C
