__If you're given 2 positions and asked to find Course and Distance:__

**Step 1:** Find **l** (the diff. in lat, in '), **DLo** (the difference in long.,
in ') and **Lm** (the middle latitude between the two positions, in minutes and tenths)

**Step 2:** Calculate using what you know, as of right now the only equation (see right) you have all
the info for solves for **p **(departure, ie. DLo converted to nm), so do that.

**Step 3:** Now that you've got **p**, you can solve for **C** (course angle) and
**D** (distance) independently.

**Step 4:** **C** is only your **course angle**, not your actual course, so you
need to figure out your actual course now.

-If you are headed NE, add the C to 000 (ie. North)

-If you are headed SE, subtract the C from 180

-If you are headed SW, add the C to 180

-If you are headed NW, subtract the C from 360

__If you are given a starting position and a Course and Distance:__

**Step 1:** You can solve for **l** and **p** already using the sin functions
at right. Do that, you'll need them to move on.

**Step 2:** Now that you know **l** (the diff. in lat.) you can find the lat. of your end position,
and you can also find your **Lm**. To find **Lm**, follow the same steps as below, but only apply**
l**/2 (half the** l**).

-If in S lat and headed N, subtract **l** from Lat 1

-If in S lat and headed S, add **l** to Lat 1

-If in N lat and headed N, add **l** to Lat 1

-If in N lat and headed S, subtract** l** from Lat 1

**Step 3**: Now that you know **Lm** and **p**, you can solve for **DLo
**using the bottom equation.

**Step 4:** Apply **DLo **to your Long 1 to find your final longitude.

-If in W lat and headed E, subtract **DLo** from Long 1

-If in W lat and headed W, add **DLo** to Long 1

-If in E lat and headed E, add **DLo** to Long 1

-If in E lat and headed W, subtract** DLo** from Long 1