Get a current
large-scale chart of Lake Ontario. This is very helpful in planning point-to-point bearings, particularly when dealing with shifting winds (remember to gybe around 2 pm, and so on).
Get a current Richardson's Chart Book. This is great for general descriptions and "finer" scale bearings. The more current book will have more current buoy changes...but not necessary the latest changes. You need to check out Notice to Mariners for that, and to amend your "chart book" accordingly.
is a good resource, but for nav use, I only use the daymark bearings and read the descriptions.
For "real" nav use, I bought "Sailing Directions for Lake Ontario", a regularly updated and reasonably priced ($15 or so) publication that gives waypoints and "word pictures" all along the lake. When used in conjunction with the Richardson's charts, it's all you need.
Just be aware that you can make mistakes
out of ignorance. Some government body removed the "Peter's Rock" 21 foot buoy about a mile west of Cobourg between 2004 and 2005, and I went way out into the lake before I made my turn west to Toronto in 25 knot
easterlies (urp!) before I figured I was sufficiently offshore
. I spent about 45 minutes confirming to my own satisfaction that the crappy little buoy that had replaced the magnificent structure of former years in fact marked the end of a rocky reef.
Things change, and if you don't want to spend money
for the current chart, you have to do your homework. On Lake Ontario, this isn't a big deal, but it's not completely inconsequential. There are people just learning
today that the "Four Sisters" in Mississauga came down two years ago, and they are learning
it by running smack into unlit piers in the dark.