I've been thinking about my vacation this summer. I would like to scuba dive. 
Scuba diving is quite an experience. Are you certified and do you have the necessary scuba skills?
Not yet! Do you know how long it would take to get certified? 
If you're going on vacation soon, it might just be better to do introductory diving. You don't need certification and it's less time-consuming.
Oh wow, thanks for the advice. I wonder if the resort I was looking at will offer introductory sessions. 
They probably do! Introductory diving is probably better, because you'll have a diving instructor guide you around. 
Oh that makes sense. I'm interested in all of the creatures under the sea.
cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open circuit for the same gas consumption; they produce fewer bubbles and less noise than open circuit scuba which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference.
Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving
do not know where I am going or when I will get there.
Even work does not take the pain away. I may be diving for my own pleasure or showing others how to do so, but when I return to the shop, it seems empty without you. I stock and order as I always did, but even now, I sometimes glance over my shoulder without thinking and call for you. As I write this note to you, I wonder when, or if, things like that will ever