Planning a SCUBA seminar?
Another IT Guy asked:
If you were planning your own SCUBA diving “seminar” to about a class of non-divers who want to try it out, what would your agenda be? Say for about a 1-hour lecture for up to 20-25 people. I was thinking I’d do a few minutes on history, then maybe 10-minute blocks on equipment, safety, basic skills, the types of dives, the physiology of diving, how to get certified, etc…
If you were planning your own SCUBA diving “seminar” to about a class of non-divers who want to try it out, what would your agenda be? Say for about a 1-hour lecture for up to 20-25 people. I was thinking I’d do a few minutes on history, then maybe 10-minute blocks on equipment, safety, basic skills, the types of dives, the physiology of diving, how to get certified, etc…
Affordable Digital Cameras
mike legg asked:
Many of us look for digital cameras that can perform the tasks that we need while being priced at reasonable rates. The various digital cameras can be found in the high end market to the mid range and also affordable digital cameras. When you are looking for the affordable digital cameras that you need for your photographs you will find many different types of cheap digital cameras that you can buy.
Many of us look for digital cameras that can perform the tasks that we need while being priced at reasonable rates. The various digital cameras can be found in the high end market to the mid range and also affordable digital cameras. When you are looking for the affordable digital cameras that you need for your photographs you will find many different types of cheap digital cameras that you can buy.
These different affordable digital cameras can be bought from a variety of camera stores. The price range from some of these cameras can start at about $30 and go as high as $500. The various cameras that can you find in this cheap digital camera market also have well known brands like Nikon, Minolta, JVC, Kodak and Fuji.
While these affordable digital cameras will lack some of the features that can be found in the high end digital cameras they can deliver good photographs. You will need to look at these cheaper digital cameras to see if they have the various items that you require.
These features can be the various shooting modes that you will get from your digital camera. Underwater, foliage, indoor, portrait, automatic are just a few of the shooting modes that you can look for when you are selecting your affordable digital camera. Some cheap digital cameras will feature interesting effects like that of panorama stitching.
This facility allows you to take three different photographs. You can them merge these distinct photographs together to create a fantastic picture. The amount of megapixels may not be that important for everyone but they do allow you to receive sharp and well defined pictures.
Since this is important for accurate and detailed photographs you should look for this information as you are going through the various types of affordable digital cameras that are available. You can use various photography magazines and digital camera buyer’s guides to help you select the type of digital camera that is within your budget.
Since there are many different models of affordable digital cameras you will need to know the various features and requirements that you need for taking a picture. Once you know these parameters you can start your hunt for the right type of digital camera. With so many different brands and models of digital cameras on the market you are sure to find your ideal and affordable digital camera.
Why is it dangerous to hold your breath when scuba diving?
Larry S asked:
I just finished my scuba certification, and they told us the number one rule of scuba diving is to *never* to hold your breath. Even when you’ve lost your regulator, you’re supposed to breath out a small stream of bubbles.
I just finished my scuba certification, and they told us the number one rule of scuba diving is to *never* to hold your breath. Even when you’ve lost your regulator, you’re supposed to breath out a small stream of bubbles.
Is this only because of the overcompression injuries you can get if you hold your breath and rise (which allows the air to expand/decompress, potentially rupturing a lung, etc.) or are there other reasons?
Okay people, enough with the grouchy “you should know this”.
First, if it’s just a matter of not holding your breath when you *rise* I totally get the whole “expanding air” / “ruptured lung” thing (reread my original question… I state it right there).
My questions is why you should not hold your breath when you’re stationary (not rising or sinking), such as during the exercises where do you regulator recovery (sweep and reach methods). It feels more natural to hold my breath during that, but the course instructions say never hold your breath; hence my question.
