Transmitters on Short Hoses?

[broncobowsher]

Yep - posted it above

You replied between when I typed and when the post actually posted.

 

[DogDiver]

You will want both a transmitter and SPG

 

[tursiops]

You will want both a transmitter and SPG View attachment 653390

I understand why you might want an SPG, but why would you want to place it so it interferes with the tank valve in case you have to feather the tank?

 

[ToneNQ]

Mine are straight into the bottom HP port. I have an SPG in my bag for a save a dive kit but that is it. Had both fitted for maybe 200 dives, never looked at the SPG.

 

[bradymsu]

Mine are straight into the bottom HP port. I have an SPG in my bag for a save a dive kit but that is it. Had both fitted for maybe 200 dives, never looked at the SPG.

This seems to be the majority opinion that I'm getting from a variety of sources: For sidemount, the transmitters go directly into the bottom HP port provided they don't stick out too far or the tank doesn't prevent it. Otherwise, they should go on a 9" (23cm) hose and stored under the top tank band. A 6" (15cm) hose usually isn't long enough.

Lots of debate on the issue of SPGs as a redundancy to transmitters likely from the days when transmitters weren't as dependable. Conventional wisdom today seems to be to ditch the SPGs if using transmitters.

 

[Mike1967]

I have an SPG in my bag

ditch the SPGs if using transmitters.

This ^^

 

[Divin'Papaw]

Lots of debate on the issue of SPGs as a redundancy to transmitters likely from the days when transmitters weren't as dependable. Conventional wisdom today seems to be to ditch the SPGs if using transmitters.

I wouldn't exactly call it conventional wisdom. Yes, many do ditch the SPG. However, many also choose to keep the SPG as a backup. Rather than call it conventional wisdom I would say that it is an acceptable practice in recreational diving to ditch the SPG and only dive with the transmitter for pressure. It is also equally accepted to dive with a backup SPG.

If you are doing any technical diving with your sidemount kit you will want backup SPGs. That's in line with the long held "2 is 1 and 1 is none" philosophy in technical diving.

 

[Kofferfisch]

I discovered this configuration a while ago on the board and have been diving this for a few dives and I am actually quite happy with it.

 

[grantctobin]

I wouldn't exactly call it conventional wisdom. Yes, many do ditch the SPG. However, many also choose to keep the SPG as a backup. Rather than call it conventional wisdom I would say that it is an acceptable practice in recreational diving to ditch the SPG and only dive with the transmitter for pressure. It is also equally accepted to dive with a backup SPG.

If you are doing any technical diving with your sidemount kit you will want backup SPGs. That's in line with the long held "2 is 1 and 1 is none" philosophy in technical diving.

Did you run 2 SPGs on your backgas or on each of your stage/deco/SM bottles while you were technical diving?

 

[Divin'Papaw]

Did you run 2 SPGs on your backgas or on each of your stage/deco/SM bottles while you were technical diving?

That's a silly question and you know it. Of course I didn't. An SPG failure is far less likely than a transmitter failure. Transmitters are definitely more reliable than they used to be. I've never lost connection to my Perdix AI. However, you are still dependent upon one electronic device with one battery ... the transmitter. That is a single failure point with a failure potential high enough that it warrants redundancy. However, that is just my opinion. Dive however you wish to dive.