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Jim Donohue wrote:
As I projected responding will do little good. The way they are fixing this Jeff...is to plug in multi GPS. Don't you think it odd Jeff that the fix for over-reliance on GPS by making the system even more dependent on GPS. Where does it say that? And you do read strangely...multiple independent position receiver inputs...turns automatically in your mind to multiple independent sources...I wonder why this is? Like your use of "form" could it be you can't find the right language so you substitute your own? Two identical GPS's are not "independent". They may help in some failure modes, but certainly not all. However, the recommendations also talk about the need for for techniques other a large pile of GPS units. In particular, the cruise lines were advised to: "ensure that all watch officers adhere to sound watchstanding practices and procedures, including using landmarks, soundings, and navigational aids to verify a vessel’s position, relying on more than one source for position information, and reporting to the master any failure to detect important navigational aids." You seem to keep forgetting about this part. This was the specific advice to the cruise lines, and by implication, their ships' officers. All of the other advice had to do with the design of the hardware, which, while somewhat interesting, is not directly related to the actions of the deck officers. So what lesson can the typical daysailor/coastal cruiser take from this? Is it that they should always run two GPS's and continuously compare the answer? I don't think so, though there may be time when its prudent to have a second one handy. The advice is clearly to not be so over reliant on a single source, and to use traditional piloting techniques: landmarks, soundings, navaids. One of the reviews of this grounding pointed out that weather was in fact a factor. It was so good that the crew was complacent. Given your line of reasoning we could simple claim the good weather made the crew complacent causing all of the other items that you ascribe to over-reliance on GPS. Kind of silly but then so is your interpretation. Why not presume the NTSB people meant what they say? Why do you ignore what they say? Their specific advice to the seamen is to remember to use piloting and not to be so reliant on a a single source for position. |
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