I second the chart book option as it tends to be the most cost-effective option for a good selection of charts. I purchased the
Maptech books for the
East coast.
You didn't fill out what
boat you have in your profile, so I can't really anticipate what your style of use will be. If you have a pilot house for example, you should be good to go. If you intend on using these outside, look at
purchasing an upgraded plastic sleeve for the dimensions of the book you are
purchasing. The plastic covers that Maptech comes with for example isn't made with heavy use in mind and the seams will split open.
If you fold the book open to the desired page you can put it back in the sleeve and then make your marks on the plastic for basic piloting. I would opt for a grease pencil.
Finally, depending on your
cockpit layout, you might want a suitable paperweight to stop the chart flying off. A waterproof glove filled with sand and a zip tie on the cuff makes for a useful "helping hand" and a pair of them do a good job holding a chart down in a mild blow.
I would also recommend using an app on your
phone as an additional backup. We were using charts as our primary
navigation, got hit by a nor'easter with all our sail set, and ended up drenching our charts and with the gusts of
wind our pages started becoming detached from the spiral binding and flying away. My partner saved
Nantucket, but we
lost Portland, which was unfortunately our next port of call. I just think it's amusing that we were using paper charts and had to rely on our
electronics for backup!
Still, always +1 for belt and suspenders approach.