Announcing the SubGravity H3 - Powered by SeaBear

[SubGravity]

New firmwares update from SEABEAR! Anyone who has been following these firmware updates can see that constant improvements, based primarily on user feedback, are being implemented. See details for the H3 & T1 updates below:



Update your Subgravity H3, powered by SEABEAR, now for the following improvements:

• Now features a Dive Simulation tool.
• Stop watch functionality improved: You can now start, stop, and reset from the main menu. Stop watch option also moved to the top of the main menu to allow for much quicker utilization.
• User settings will no longer be reset with future firmware updates.

Download the new H3 firmware now (click "Update 1.45 Now Available!"):
https://www.sub-gravity.com/pr…/subgravity-h3-dive-computer/




Update your Subgravity T1, powered by SEABEAR, now for the following improvements:

• Now features a Dive Simulation tool
• Stop watch functionality improved: You can now start, stop, and reset from the main menu. Stop watch option also moved to the top of the main menu to allow for much quicker utilization.
• User settings will no longer be reset with future firmware updates.
• Algorithm with the T1 wheel has been improved to avoid mistakenly scrolling when pushing to select.

Download the new T1 firmware now (click "Update 1.45 Now Available!"):
https://www.sub-gravity.com/pr…/subgravity-t1-dive-computer/

 

[DeputyTom]

Just updated my H3 to 1.45. Can't wait to try out the new features. I'm still waiting for the "Science Unlock" so I can adjust H2O density for salt water or fresh water. This feature is important as most of my dives are deco dives.

 

[Divetech99]

Can you explain the science unlock a bit more? Thanks

 

[DeputyTom]

Can you explain the science unlock a bit more? Thanks

Science Unlock is what Seabear/Subgravity is calling the settings for H2O density. The difference in water density between salt water and fresh water. The density of water will affect your decompression times. Shearwater computers provide it and I'd like to better compare deco times between the 2.

 

[RonR]

Science Unlock is what Seabear/Subgravity is calling the settings for H2O density. The difference in water density between salt water and fresh water. The density of water will affect your decompression times. Shearwater computers provide it and I'd like to better compare deco times between the 2.

The density of the water is irrelevant to your decompression times, those are determined only by pressure, which is all the sensors can measure. The reason for having a salinity/ density adjustment is only to make the absolute depth (measuring tape) readings more accurate. If you were diving in, for instance, mercury (not recommended) your depth readings would be very overstated, but your deco schedule would still be right.

-Ron

 

[Nuribromanski]

The density of the water is irrelevant to your decompression times, those are determined only by pressure, which is all the sensors can measure. The reason for having a salinity/ density adjustment is only to make the absolute depth (measuring tape) readings more accurate. If you were diving in, for instance, mercury (not recommended) your depth readings would be very overstated, but your deco schedule would still be right.

-Ron

right 4 the depth readings, but not right 4 the actual depths dove....??

 

[RonR]

right 4 the depth readings, but not right 4 the actual depths dove....??

Right for the pressure readings, but not necessarily for the depth numbers those pressures get converted to for display.

A computer calibrated for denser salt water will register a slightly shallower than actual depth (by about 3%) for a given pressure if it is used in fresh water. But the difference is only in the displayed depth numbers, deco calculations will use only the measured pressure so it makes no difference for deco schedules. For some scientific divers, divers making maps, etc. accurate physical depth measurements can be important. For most of us it doesn’t matter, we are only concerned about decompression.

-Ron

 

[Divetech99]

The density of the water is irrelevant to your decompression times, those are determined only by pressure, which is all the sensors can measure. The reason for having a salinity/ density adjustment is only to make the absolute depth (measuring tape) readings more accurate. If you were diving in, for instance, mercury (not recommended) your depth readings would be very overstated, but your deco schedule would still be right.

-Ron

Ron, thanks. So I'm guessing that this feature has no real useful value to the typical Rec or Tec diver? Absolute depth of a wreck for instance can change depending on tide levels.

Side question, why use NFC for uploads to smartphones? This excludes all IOS users and is currently only useful for android devices. A Petrel supports cordless data transfers to iOS and Android smartphones, couldn't the same technology be used by the H3?

 

[MixAddict]

As Ron has mentioned above, the "science unlock" is for use by scientists, underwater archeologists, cartographers, etc. who need 100% accurate depth measurements. For the average diver whether you are 100 feet or 100' 1/16" has little bearing. It really has no application for the average rec or tech diver. As mentioned above, it has no relationship to decompression calculations whatsoever. The decompression calculations are based on pressure.

Hope this helps to clarify.

Kind regards,
Randy

 

[Divetech99]

Quick question. While wearing the H3 on land, do you need to press a button to get the time or is time/date displayed constantly while on land?