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get one made of Nylon and one of the plastic markers, no good finding out a seam has burst when you really need it, it is safety equipment. I have the https://www.diversalertnetwork.org/dive-store/?id=5 with a 15m spool. It is large and bulky to pack but it stands tall above the surface, in...

for tech you will probably need a dc that you can put into gauge mode and use as bottom timer, AFAIK there are no multi gas (trimix) capable dcs in your price range.

You need some sort of timing and depth measurement even if you dive tables, so why not take a computer that does both and keeps track of your nitrogen load for you. Getting a cheap (or second hand) divecomputer is a good idea IMHO as long as you understand what it is trying to tell you.

I'd take a XTX50 as octopus you can detune it (turn in the knob) to prevent freeflow while not in use and have the comfort of a great easy breathing reg if you turn on Venturi and turn out the knob for breathing it. BTW the only difference between a XTX 50 and a XTX 200 second stage is the...

I dive the Weezle Compact in Summer (temp range 8-15°C) and the Weezle Extreme in winter (temp range 2-6°C) the Extreme does reduce flexibility but not as much as I had expected. I have also dived my Compact with functional skiing underwear underneath before I had my Extreme but the gain in...

I always check these questions with the dive center providing my tanks for the trip. They are the only ones who really know. Why not drop them an e-mail?

In my IANTD advanced Nitrox course we used tables. They are a tool every tecnical diver should be aquainted with

the OP seems to have left ;) I too do not understand why I was taught that the safety stop was mandatory on dives deeper than 30m. Meanwhile I have understood that all these "rules" are only recommendations, and my divecomputer only shows depth and time and a statistical aproximation how long I...

Wikipedia is talking about 1atm while divers talk about much higher pressures. the danger of CO like any gas lies in its partial pressure not its percentage. The book I recommend is the Handbuch technisches Tauchen by Aspacher (AFAIK only available in German called the bible of technical diving)

on my Laptop my Predator is only recognized by the builtin Bluetooth adapter after I open the Bluetooth menu and search for COM ports used. I do not know why I have to open this every time but it works (for me)

I can tell you about Marsa Alam next week :D

IMHO the corals are better in the south, you can get to Elphinstone from Marsa Alam easily and the chance to see sharks there is good, though not as good as in spring, they seem to prefer colder water. You can (or not) find dolphins and turtles everywhere in the Red Sea. Up north there are more...

with the metric system a 10l cylinder will hold 10l of water - or 2000l of air at 200bar :blinking:

some regs (e.g. the Apeks series) can be opened without any tools under water (though putting them together again with thick gloves might be difficult)

Shearwater Research Petrel OC/CC Standalone | Trimix Dive Computer for Tech Diving

he used three divecomputers and we have no feedback about their performance.

In Egypt CDWS have stated that taking knives is ok. http://www.cdws.travel/documents/rules-regulations/gloves%20and%20knives.pdf

once testing every tank for CO has become a habit, testing it for O2 at the same time only adds half a minute to the procedure.

be sure to get a trilam suit if you want to usr it in the tropics, neoprene would likely be too hot

I bought all my regulators used except for one first stage (Apeks DS4) which was a shop exhibit for two months. Owning reg is expensive as you have to maintain it but you know when it was serviced last and where it has been, but I cannot imagine trusting equipment rented at dive destinations...