Nav FREEWARE

Tides Program:
http://www.wxtide32.com/
http://vps.arachnoid.com/JTides/index.html

GPS Program:
http://www.gpstm.com/

COLREGS

The Rules
https://mcanet.mcga.gov.uk/public/c4/solas/m_notice/msn/msn1781.pdf

General Overview
http://www.imo.org/Conventions/contents.asp?doc_id=649&topic_id=257

Excellent COLREGS resource: you can test yourself.
http://www.sailtrain.co.uk/Irpcs/

Navrules program (Shareware, but works fine without registering)
http://www.navrules.com/download/nav224.exe

Bowditch -The American Practical Navigator

http://www.irbs.com/bowditch/

Waypoint Planner in Excel

This is a working spreadsheet on a waypoint planner. I haven't played with it for a while. Please let me know if there are any bugs.

http://www.mediafire.com/?622ydrbytfy

Meridinal Parts Formula- for EXCEL

Cell ref to latitude = AK18


=IF(AK18=0,0,7915.704468*LOG10(TAN(0.785398163397448+
(AK18/2)))-(23.0133633*SIN(AK18)))

MCA Orals

http://www.mcaorals.co.uk/