If you're going after the big fish, then make sure you've got one of these fishing scales handy to measur the weight of your catch. 

These stainless steel fishing scales will weigh up to 50kg (110 lb) and include a large hook to hang your catch from. Use them for fishing or as luggage scales (to make sure the missus doesn't overpack!).

With both metric and imperial measurements, you can record your weight in any language!

The best thing about these scales is that they're almost unbreakable, don't require batteries (unlike expensive electronic scales), and aren't effected by salt water. You can leave them on the boat or in the tackle box and know that they're be ready to go next time you head out for a fish.

For a closer look, check out the video below.