IslandAdventurer
Registered
Hi All,
Looking for some advice with my D4i novo. Yesterday was using it on a Nitrox dive (30% Mix).
It was a non-repetitive dive and the first in a week so there should have been no residual nitrogen.
Anyway the dive started at 28m and proceeded to 24m in the first 10mins. My computer was giving me just minutes of deco left. At 15 mins into the dive, still at 24m I only had around 3 mins of NDL displaying. I swallowed up a few meters, still 3 mins... At 28mins @ 20m I exceeded the NDL and was given a ceiling alert and deco stop + mandatory safety. I proceeded up, did the stops and finished the dive.. (48mins 28m Max)
It was really strange to get such a short NDL for the depths and times so I plugged the D4i in and downloaded the graph (attached image). Suunto's DM5 gives a completely different NDL throughout the dive. It also shows the when the computer went into deco but gives an NDL of 33 mins a minute before.
What could have caused this? The computer was definitely set to 30% (Check a bunch of times after the dive and confirmed in the image). My NDL should have read 33 mins and should not have entered deco. Any ideas?
PS. I know this profile is not ideal but there was serious atlantic surges along a wall and we were getting tossed around toward the end of the dive (hence the accent warnings) Winter is coming to Ireland!
Looking for some advice with my D4i novo. Yesterday was using it on a Nitrox dive (30% Mix).
It was a non-repetitive dive and the first in a week so there should have been no residual nitrogen.
Anyway the dive started at 28m and proceeded to 24m in the first 10mins. My computer was giving me just minutes of deco left. At 15 mins into the dive, still at 24m I only had around 3 mins of NDL displaying. I swallowed up a few meters, still 3 mins... At 28mins @ 20m I exceeded the NDL and was given a ceiling alert and deco stop + mandatory safety. I proceeded up, did the stops and finished the dive.. (48mins 28m Max)
It was really strange to get such a short NDL for the depths and times so I plugged the D4i in and downloaded the graph (attached image). Suunto's DM5 gives a completely different NDL throughout the dive. It also shows the when the computer went into deco but gives an NDL of 33 mins a minute before.
What could have caused this? The computer was definitely set to 30% (Check a bunch of times after the dive and confirmed in the image). My NDL should have read 33 mins and should not have entered deco. Any ideas?
PS. I know this profile is not ideal but there was serious atlantic surges along a wall and we were getting tossed around toward the end of the dive (hence the accent warnings) Winter is coming to Ireland!