I do believe there are posters here who are very militant about horizontal trim. I remember there was a thread here where folks were insisting on using ONLY their kidney dump, because they didnt want to break trim ... even for the 2 seconds to tilt up and dump using the elephant trunk?
However, I would say even the most extreme horizontal trim militant would allow a break in trim for exploring a wall, or looking up at a dolphin or whatever. It may not seem that way, because they are stressing the need for horizontal trim, but I would just assume they have that flexibility.
That's a fair point, but "militant" doesn't sound like the best choice of word to me. "Militant" sounds aggressive. Rather, WHEN I want to be in horizontal trim, I'm "meticulous" or something along those lines, about being in horizontal trim. I don't tilt up and use the corrugated hose dump but rather the rear dump. It MIGHT be fine under some circumstances to tilt up briefly and use the corrugated hose dump, but I'm afraid if I were to do it too much I would allow myself to get into a habit of doing so. As has been mentioned, when you're in horizontal trim there is often a reason, such as being close to a silty bottom or coral reef, and breaking trim might stir up the bottom or harm the reef. So I want my reflex or muscle memory to be to use the rear dump. For that reason, I make it a habit to always use the rear dump when I'm horizontal. But that's just me. If someone else is in blue water and wants to use their corrugated hose, who am I to object? I would only point out that one should be wary of allowing it to become a habit. Is that militant?