Been reading this with great interest. As a result, last night I had a late one after a long day at work, absolutely knackered so I took along one of my Delkims and receiver. I was fishing my local river that follows a really weird pattern that I've learned over the years: I'll get a pull, or several pulls over the course of an hour before the rod finally hoops round. This particular narrow swim I fish nearly always gives a huge line bite about half an hour before a mental bite.... Whether the fish are moving down river from the shallows after dark I don't yet know, but anyway I digress.
I was unintentionally dozing off, after telling myself I'll give it until midnight when the alarm let out a single beep and the rod sprang back. The classic pre-bite liner. This woke me up, alerted me and after draining the rest of my flask at 0030 the rod slammed round and my first double of the season was soon on the mat.
If I wasn't using the alarm I would have missed seeing the liner, wound in and gone home very grumpy at a blank.
Yes I could have been touch legering but I'd be in an uncomfortable position trying to hold the rod in a tight swim, it's rare that I get a fish in under two hours and due to the nature of my job I'm lucky if I get a few hours a week fishing so I have to fish as efficiently and effective as possible. Using an alarm really helps my approach. I don't bother switching it on while I'm awake and alert but when the eyes get heavy it's really useful.