Written by the TreasureGuide for the exclusive use of the Treasure Beaches Report.
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| Typical Metal Detector Coil Coverage Pattern. |
In past years I warned about how much can be missed as the result of a casual or careless sweep pattern. I made the above illustration and posted it years ago to show what a typical coverage pattern actually looks like (See The Treasure Beaches Report Direct From Florida's Treasure Coast. for example,)/ The black area shows what the coil goes over when a detectorist walks along swinging his detector and the white area shows what is missed.
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| Nokta Makro Ivenio. |
I recently saw an advertisement for the Nokta Makro Invenio metal detector, and since it seemed to have some new and advanced features, I decided to look into how it actually works.
The Invenio has a 3D imaging system that provides images that look something like those that were talked about and even advertised decades ago but which never seemed to materialize. I wondered if the Invenio actually offered some of the advancements that we have long been led to expect., so I was eager to see how it was implemented.
One of the first things that struck me was the image of the ground being covered by the coil. Here is an example as shown on the Invenio imaging system..
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| Area Covered By Coil (black) As Shown On The Invenio Imaging System. |
Look familiar? That is actually a useful image. It shows what the detectorist has covered, and more importantly, the ground that was missed. I assume that the Invenio image is accurate. I can't say it is for certain without doing some tests.
In the video you could see how difficult it was for the detectorist to make sure he covered every inch. You might want to watch that part of the video carefully. .
The area shown covered appeared to be more narrow than the coil. In the past I recommended some techniques for testing the coverage of your coil and the areas of sensitivity. See The Treasure Beaches Report Direct From Florida's Treasure Coast.: 3/29/15 Report - Importance and Method Of Determining The Shape Of The Area Of Target Sensitivity For Your Metal Detector Coil..
The imaging hardware is rather bulky and although it appears that it can be operated by a single person, it would seem easier if one person carried the imaging hardware while the other person actually used the detector. In its current configuration, I can't imagine a single person swinging the coil with precision while watching the screen. I would expect future attempts to miniaturize and better integrate the imaging system.
I've seen the Invenio offered for under $8000. That is a hefty price - not to say it isn't worth it, but that price obviously wouldn't be justified unless you were going after something more than random coins. The video indicated that the purpose of the detector was for hunting caches.
I'm not sure at this time how much benefit the 3D imaging provides. I did notice in the video that many of the small objects detected by the Invenio were also detected by an Equinox detector.
I wouldn't mind having an Invenio to play with, but without the right application it would be little more than an expensive toy. The expenditure could be justified if you were hunting the right kind of target in the right type of environment, but for me, more testing would be required to better understand the system's capabilities.
The video brings up several interesting issues. You might want to take a look.
Here is the link.
And here is another.
(15) TESTING £8499 NOKTA MAKRO INVENIO - YouTube
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How would you ship valuable coins?
Most coin dealers recommend USPS Registered mail.
JM Bullion says, In our combined decades of experience in the bullion industry, USPS Registered Mail is better than 99.99% effective.
Every time the package is handed off from one post office agent to another there is a documented signature. This legally documents a parcel’s custody transfer beginning with your shipping it… all the way to the adult signature required upon your parcel’s safe delivery.
Since only a few agents at each mail facility are permitted to sign for registered mail packages, which are kept safely locked while at the facitlity, the process can be slow, especially if the authorized agents are on vacation or something. A package can remain at one facility for days awaiting the signature of an authorized postal worker.
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