When can you add two to eleven and get one?

What runs fore to aft on one side of a ship and aft to fore on the other?

"Solve" the below by substituting the correct words for the letters. Example: 3F = 1Y (3 feet = 1 yard)

1. R = R = R

2. 8D -24H = 1W

3. 3P = 6

4. HH and MH at 12 = N or M

5. 4J + 4Q + 4K = FC

6. 23Y - 3Y = 2D

7. A + N + AF + MC + CG = AF

8. E - 8 = Z

9. Y + 2D = T

10. C + 6D = NYE

11. 1 + 6Z = 1M

12. NN = GN

13. T = LSS

14. M+M+NH+V+C+RI = NE

15. AL and JG and WM and JK were all A

16. N and P and SM = S of C

17. IB in the H = 2 in the B

18. Y - S - S - A = W

Stumped by any of the above? Check the answers and the lesson.