JC Placson: "How many hours is considered safe? I did my first mild deco dive today (100' - 28 min, 1 min stop at 20' on 50%EAN, then a 3 min stop at 15' still on 50%EAN) and had a 5 hour SIT before driving home. The drive home goes over a mountain about 1800'."
If you will look in NOAA's Dive Manual, you will find the table that seems to be the easiest to use, and most sensible at the moment. You can balance that with the experience of those around you, and your own judgement.
We all have to remeber that the tables (any and all of them) are built on averages. At any given time, any one of us can fall outside of the "box"!
You are "somewhat" better off in a car, due to the slower rate of change. It is, however, still a situation of: (1) How much tissue loading exists, and (2) what is the total pressure difference? Remember, it is always a time versus dosage equation.
Current tables and models for wet computers are based on 8000 ft msl as a "cabin altitude" for passenger aircraft. Modern jet aircraft will generally be holding a somewhat lower cabin altitude, in the range of 6000 to 7000 ft msl, due to better pressurization systems, but you wouldn't want to bet the bank on that.
BJD
If you will look in NOAA's Dive Manual, you will find the table that seems to be the easiest to use, and most sensible at the moment. You can balance that with the experience of those around you, and your own judgement.
We all have to remeber that the tables (any and all of them) are built on averages. At any given time, any one of us can fall outside of the "box"!
You are "somewhat" better off in a car, due to the slower rate of change. It is, however, still a situation of: (1) How much tissue loading exists, and (2) what is the total pressure difference? Remember, it is always a time versus dosage equation.
Current tables and models for wet computers are based on 8000 ft msl as a "cabin altitude" for passenger aircraft. Modern jet aircraft will generally be holding a somewhat lower cabin altitude, in the range of 6000 to 7000 ft msl, due to better pressurization systems, but you wouldn't want to bet the bank on that.
BJD