Hatch covers add a nice protective layer to your expensive overhead hatches. They keep out sun or star light and might even help a bit deterring a little leak. Lexan polycarbonate windows are expensive and can be damaged if not cared for. A cover is a good way to help preserve these windows. Unfortunately, we seem to lose one or two covers a season to a bad storm or rotting shock cord. You can make an easy hatch cover in just a few hours.
I remade an old hatch cover previously and wrote about how I did it and resources I used here. This blog is about making a hatch cover from scratch. I've included the sizes I used for our hatches. You can adapt your hatch cover easily based on these sizes and proportions. Read more [...] 
You Can Make an Easy Hatch Cover
Hatch covers add a nice protective layer to your expensive overhead hatches. They keep out sun or star light and might even help a bit deterring a little leak. Lexan polycarbonate windows are expensive and can be damaged if not cared for. A cover is a good way to help preserve these windows. Unfortunately, we seem to lose one or two covers a season to a bad storm or rotting shock cord. You can make an easy hatch cover in just a few hours.
I remade an old hatch cover previously and wrote about how I did it and resources I used here. This blog is about making a hatch cover from scratch. I've included the sizes I used for our hatches. You can adapt your hatch cover easily based on these sizes and proportions. Read more [...] 
Three more jerry cans arrived on deck when we were in George Town, Exuma which meant sewing more covers to add to our can cover collection. We like the canvas covers to help reduce the UV deterioration of the jugs which store extra water and fuel on deck.
I decided to try an improved cover design over the initial ones I made which I posted about here. I’m sorry Julie Gifford that I ever doubted you. For the first covers I thought I could bypass one of the steps outlined in Julie's book, Canvas for Cruisers. This time I took her advice and had a much better outcome. One should listen to the professionals. Lesson learned.
The Captain says this is a fairly standard water jug with handles on the top and side 
Susie Harris offered to share her blog post on flag making. Seamless Sailor has posted before on flags here. Susie's post adds some additional details and tips that I thought warranted this second post on flags.
Aboard Temptress of Down she is undertaking several sewing projects. She is a self-described "craft junkie with a sailing habit". Sounds like the perfect Seamless Sailor to me! Thanks, Susie, for providing insight on making courtesy flags.
Vexillology
12/30/2013
Minima YC Burgee - handmade by moi
...Vexillology is the study of flags and we've been studying them hard aboard Temptress for some weeks as every country expects visiting boats be they super tankers or the tiniest of yachts, to fly a courtesy 
After you spend a lot of time or a lot of money on teak cap rail brightwork -- sanding, varnishing wood -- you want to show them off as they shine in the sun. Folks come by the dock admiring your shiny cap rails and “oh and ah”. But wait. You’ve just invested your time or money to get them that bright and shiny. How long do you want them to stay that way? A good while, right? Sun with its UV threat will have its way with your teak. You might consider canvas covers, at least while the boat is not in use at the dock. We saw these cap rail covers in a Charleston marina. Pretty nice, huh?
Notice that Magnolia doesn’t have these covers – yet.
A few references that might be of help:
-- In a Sailrite forum 
March 2014 - Updated post on Jerry Can Covers here.
I recently made three jerry can covers - two were for the same sized cans for diesel and one for water. The plastic jugs can degrade in the sunlight, so covers are a worthwhile project. I started with Julie Gifford's directions in Canvas for Cruisers. I decided to make a few modifications. She recommends hemming the bottom after sewing the side seam. I decided to just pin it and hem at the end after I added the top.
I didn’t add any darts as Julie recommends as our jerry cans didn’t really need that tight a fitting on the top. I basically made a rectangular top. Adding the top was a bit of a guessing game. Added and pinned and re-pined then closed my eyes and