Never trust your PDC. You have been taught to plan your dive so dive the plan. I am a firm believer that electronics and water don't mix.

hmmm.. since PDC is so common now .. u key in the depth... u key in the time.. comp tell u to go up etc...

but what if it fails halfway.. do u abort the dive? ... or follow ur buddy or other group?

how about those that cant afford their own PDC like me? in my OW cert, i was told to plan using the tables and dive the plan..not according to some gadget that i wud stake my life on..whats the purpose of the RDP or the wheel if all we need is the PDC?

SKK ar, knowing u, u surely remember SD and snafu kept on reminding ppl not to depend entirely on the PDC..correct ar sifus? i stand to be corrected..still noob lar

thanks holemaster for the info...

hey bijan.. yeah i know that both of them always stress that...

but believe me, in this world..or even in this forum... lotsa divers out there trusting their comp... i've read few post in this forum

hmm..  it's like .. electronic stuff can make one's life easier... eg, ppl prefer email than snail mail... so, it's like.. since they have comp, it will calculate for them.. it's easier than reading the RDP... probably more dangerous for those ppl who go deep... but for fun dives.. or shallow reefs... probably they think that it's ok  :

Quote

hmmm.. since PDC is so common now .. u key in the depth... u key in the time.. comp tell u to go up etc...

but what if it fails halfway.. do u abort the dive? ... or follow ur buddy or other group?

how about those that cant afford their own PDC like me? in my OW cert, i was told to plan using the tables and dive the plan..not according to some gadget that i wud stake my life on..whats the purpose of the RDP or the wheel if all we need is the PDC?

SKK ar, knowing u, u surely remember SD and snafu kept on reminding ppl not to depend entirely on the PDC..correct ar sifus? i stand to be corrected..still noob lar

Read my reply to jgshuwei above this reply

IMO.....  :

Know your DIVE TABLE very well..... before moving on to PDC.

Know your DIVE WHEEL very well.....before moving on to PDC

[highlight]PDC[/highlight] ... PLEASE READ THE INSTRUCTION MANUAL & UNDERSTAND IT WELL so you know what PDC is telling you when you dive.... TAKE CHARGE of the dive & DONT LET PDC take charge of your dive.

If your PDC FAILs half way through the dive ... I would choose to ABORT The Dive & log the time out of water manualy..... I do have diving watch with me.

[highlight]DO NOT AT ANY TIME FOLLOW ANOTHER DIVER WITH PDC AS THIS IS A WRONG PRACTISE[/highlight], it might be his 1st dive of the day & 3rd dives for you ..... or His 1st diving day & your 3rd diving day.

Anyway[highlight] BE CONSERVATIVE[/highlight] & BE SAFE.

 ;D

I've had failed PDC before...battery kaputt UW...I abort the dive...go to 5m and count to 180.

IMO.....  :

Know your DIVE TABLE very well..... before moving on to PDC.

Know your DIVE WHEEL very well.....before moving on to PDC

[highlight]PDC[/highlight] ... PLEASE READ THE INSTRUCTION MANUAL & UNDERSTAND IT WELL so you know what PDC is telling you when you dive.... TAKE CHARGE of the dive & DONT LET PDC take charge of your dive.

If your PDC FAILs half way through the dive ... I would choose to ABORT The Dive & log the time out of water manualy..... I do have diving watch with me.

[highlight]DO NOT AT ANY TIME FOLLOW ANOTHER DIVER WITH PDC AS THIS IS A WRONG PRACTISE[/highlight], it might be his 1st dive of the day & 3rd dives for you ..... or His 1st diving day & your 3rd diving day.

Anyway[highlight] BE CONSERVATIVE[/highlight] & BE SAFE.

 ;D

yes i hv to agree that even PADI manuals states u shouldnt follow other ppl dive comp. Bcoz different ppl has different dive profile. But if its ur dive buddy of which u hv started the dive for the day with that person with similar dive profiles and logged dive and time. And ur dive comp failed in the middle eg 3rd dive....the best would be to abort the dive or the least to be above his depth....just my 2 cents opinion...

sorry... if i this is yet another stupid question.. btw..

1. why u need a computer?
- max depth
- current depth
- current temp
- lowest temp
- current time
- timer
- indication of ascent speed

anything else?

2. what info do u need to provide to the computer b4 any dive?

i'm just want to grab to usage of it.. coz my thinking, currently is that, if we plan our bottom time, how depth we r going, i can't see why we need a dive comp  :

sorry.. i don't have any knowledge on this.. and tried to search the net.. but found garbage.

would appreciate your kind reply, thanks

Question #1:

I only need a computer as a back up to my dive plan, and to use it to compare to what I've planned when I'm filling in my logbook.

Question #2:

Info you need to feed the PDC: current time and date

I know Suunto dont hv to feed any info. Just Dive and it'll do all the necessary work

That's because the dive shop's done it for you  

And when you change battery you have to send it in to a service center and they will do the resetting there. Expensive The fun there is when you realise that the dive you did yesterday is logged as next year's just because the service center's employee didn't get to go on leave and so on.

I change my own PDC battery. So I have to feed in info when needed.

hmmm.. i think my above post looks stupid... coz i don't know how a dive comp funtions.... and don't know what to ask and hpw to ask  

Quote

sorry... if i this is yet another stupid question.. btw..

1. why u need a computer?
- max depth
- current depth
- current temp
- lowest temp
- current time
- timer
- indication of ascent speed

anything else?

2. what info do u need to provide to the computer b4 any dive?

i'm just want to grab to usage of it.. coz my thinking, currently is that, if we plan our bottom time, how depth we r going, i can't see why we need a dive comp  :

sorry.. i don't have any knowledge on this.. and tried to search the net.. but found garbage.

would appreciate your kind reply, thanks

Question #1:

I only need a computer as a back up to my dive plan, and to use it to compare to what I've planned when I'm filling in my logbook.

Question #2:

Info you need to feed the PDC: current time and date

Im new myself using the dive comm

But I think it is my best buddy, alarming me about to stay away from deco dive.
In addition it will precisely telling me the Surface interval time and no flying time for me

i.e. 1)having repetetive dives in sipadan requires me not to fly for 25 hours after the last dive.  2) having normally short SI will show you the Non deco limit you can go, as sometime your profile may be different with the DM or your buddy.3) It will be a great help if you are doing a multilevel dive as it will show you how long you can stay at different depth. 4) its very conservative. 5) If you do deco dive, it will indicates several safety stop at different depth to release the Nitrogen.

Sifus, Correct me if the above is not the true fuctions of DComm.  

SKK, here's a link for u..

http://en.wikipedia.org/wiki/Dive_computer

thx bijan ... will check it out... kekekee.. really curious to know

hmm... probably need to sit down with you guys and need your assistance on that  :

until now, i still don't know what a dive comp can help u with.... :-/

hmm, for those dive comp without backgas reading,

(dont talk about planning with rdp)

u just put the dive comp on and jump down... after certain time, the dive comp will do the calculation ... and will signal u to go up? or something like that??

how will it know that u dont have air already and need to surface?

will it beeps u when ur max time within ndl has reach?

Mine has all those features...wireless transmitter etc.

But like I said, I am not too keen on water mixing with electronics, so I rely more on analog methods. I plan my dives, and dive my plans.

Quote

Im new myself using the dive comm

But I think it is my best buddy, alarming me about to stay away from deco dive.
In addition it will precisely telling me the Surface interval time and no flying time for me

i.e. 1)having repetetive dives in sipadan requires me not to fly for 25 hours after the last dive.  2) having normally short SI will show you the Non deco limit you can go, as sometime your profile may be different with the DM or your buddy.3) It will be a great help if you are doing a multilevel dive as it will show you how long you can stay at different depth. 4) its very conservative. 5) If you do deco dive, it will indicates several safety stop at different depth to release the Nitrogen.

Sifus, Correct me if the above is not the true fuctions of DComm.  

 

Those info you can obtain thru the recreational dive planner (RDP) that you were taught to use during OWD course. PDCs are conservative only if the conservativeness function has been selected.

A multilevel dive profile is less conservative than a normal square dive profile.

It is very dangerous to do deco dives and relying on the PDC to tell you where and how to do deco stops.

Maybe Im too relying on dive comm.. dah manja and malas

Need to belajar balik RDP and wheels, lama sangat tak guna

Cheers bro

No Problem. Do that...dive safe  

Question: If use a RDP, what do you use? Deepest depth or average depth? This is important as it will determine the pressure group. Even we go down to 30m, we don't stay at 30m all the time.

Thanks!