[PSUBS-MAILIST] Commercial question

[via Personal_Submersibles]

Pinned into some kind of "only one way out" configuration by the currents. Kind of nerve wracking, that one.
Vance



-----Original Message-----
From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Mon, May 19, 2014 10:38 am
Subject: Re: [PSUBS-MAILIST] Commercial question


What are  ‘box canyon’ current pins ?  I don't want to get stuck in one !

--- personal_submersibles at psubs.org wrote:

From: Phil Nuytten via Personal_Submersibles <personal_submersibles at psubs.org>
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Commercial question
Date: Wed, 7 May 2014 22:31:18 -0700



Hi, Scott,
The major reason that quite a few operators prefer subs over ROV’s is the absence of a surface  tether. This allows you to go places that you shouldn’t and wouldn’t go with a machine because the risk of entanglement – inside platform legs, pile jackets, etc., There are a number of other reasons that have to do with the operators senses being right on the site rather than a half a mile away. Difficult to explain is the ‘whole grasp’ scenario that ROV operators who try manned subs almost always mention. Simply put, in a sub with a wide view port or a 360 degree dome,  you have a strong sense of where everything is – how long ago you passed that pipeline, what direction it’s in to go back to, the lay of the bottom,  the trending of the currents, where to find lees to hide in, how to avoid ‘box canyon’ current pins, the ability to hit ‘auto altitude’ and fly a fixed height above a pipeline or cable regardless of the bottom (and therefore the cable’s) undulations. When it comes to doing complex work using manips, there’s no contest man versus machines. Machines do get the work done if they are set up properly, but much slower and with many tries, compared to the pilot whose hand on the joystick is five feet away from the work .
You often hear ROV types say ‘well, it’s just the same as being there”. . .  Yeah, right! just like telephone sex is the same as the real thing!
I’ll get off my soapbox now.
Phil

 

From: swaters via Personal_Submersibles 
Sent: Wednesday, May 14, 2014 7:43 PM
To: personal_submersibles at psubs.org 
Subject: [PSUBS-MAILIST] Commercial question

 

I have always heard that ROV's are cheaper to operate, less risky, and cheaper to buy. I was curious what is the advantages of submarines in the commercial world such as the oil industry? It seems like Phil Nuyten has been able to be sucsessful with submarines. Just a curiousity of mine.
Thanks,
Scott Waters
 
 
 
 

Sent from my U.S. Cellular© Smartphone


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