A world flag (or ensign) as well as the national shades generally come in a rectangle shape. These will frequently have a ratio of 1:2 or 3:5 of width towards the length. The flag should also be presented from a pole far from the stern. It must not get in the way of the proper operations of a ship such as a boom that spans atop the stern. In this instance, the flag should be flown from a backstay.
The world flag must be flown from 8 in the morning until the sun sets. If you intend to leave the vessel and might not be able to come back before sunset, it is best to take down the ensign. Traditionally, the ensign is not allowed be flown in the evening.
Some of the ensigns showcased in the western part of the globe include the Old Glory which features the 50 stars and the U.S. Yacht Ensign which showcases one fouled anchor above a circle with 13 stars of the United States.
In the United Kingdom, it is the Union Jack which is presented in many places, showcasing the 3 super-imposed red plus white crosses against a blue canton particularly reserved for warships. Furthermore, the Red Ensign is the banner of maritime practices by recreational boaters.
In Canada, the Maple Leaf is featured on the national flag of Canada. It is the chosen ensign for various Canadian boats and vessels. The flag includes a couple of bands of red with a red maple leaf in the middle and placed against a white background.