Saturday, August 19, 2017

8/20/17 Report - Crew of Sea Reaper Bringing Up 1715 Fleet Gold Coins Off Treasure Coast. Shipwreck Treasure of Rooswijk. Weather Watch.

Written by the TreasureGuide for the exclusive use of

1715 Fleet Gold Coins Found by the Crew of the Sea Reaper
Photos submitted by Captain Jonah Martiez

Captain Jonah sent me the following message with the above photo.  New find. SeaReaper salvage boat is on the gold. These are great guys and work hard looking for some treasure. Congrats boys!

Those are some beautiful two escudos.  You can see the denomination on a couple of them.

I'll take a closer look at some of these later and maybe have a few comments about them.

Thanks to Jonah for sharing and a big congratulations to the crew of the Sea Reaper!

It isn't everyday that you get piles of gold.  Sometimes you have to work your way through some hard boring days to get there.  I always figured that the longer the dry period got, the closer I was getting to the next big hit.


Treasure and intrigue: scientists unravel story of 1740 Kent shipwreck.

Excavation has brought up silver dollars, pewter jugs and a mystery chest from Rooswijk wreck in Goodwin Sands...

Here are some of the coins.

 Photograph: Zeeuws maritiem muZEEum/PA
And here is the link for the rest of the story.


Yesterday I posted what I thought was a really useful video that shows a helpful trick that I learned only after a lot of years of detecting. The video didn't get nearly as many views as I expected and am wondering why.  I guess I didn't successfully make the point about how useful it is.  Maybe I told everything in the text, but the video adds a lot - in my opinion.


I watched a couple episodes of the first season of Mine Hunters on the National Geographic channel Saturday.  Not my favorite, but an ok show.

Not treasure hunting related, but I watched some of Fifth Wave, a movie about how citizens were made to appear like enemy invaders and their own children tricked into killing them.  It was an interesting movie plot that made me think how the establishment could turn the right and left against each other so they can maintain power.  Might seem far-fetched, but with the media fed frenzy of today, totally imaginable and worth thinking about.


The systems I've been watching on the National Hurricane Center map decreased in strength over night.  I"ll be watching and reporting on the one that might come our way.  Right now it looks like it won't be much, but there is still time for things to change.

Happy hunting,

8/19/17 Report - New Video To Show How To Identify Target Shape From Audio Signal Alone. Tropical Activity and Predictions.

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Harvey is going to cut across the Yucatan and then back out into the Gulf again.

L92, which is the next one to the east of Harvey is headed towards us.  The question is how strong it will be.  It did not strengthen last night.  It has a ways to go yet though.

Right now the surf is only one to two feet on the Treasure Coast.  Nothing big is predicted at this point.

The tides are pretty big.  There are some nice negative tides.


ATX Coil Over Broken Iron Shipwreck Spke.
Source: See link to video below.
I've talked a lot about how much you can tell about a buried target from the audio signal alone even if you are using an All Metals or Pinpoint mode.  The audio signal will tell you a lot about the target's shape, size and depth if you really understand your detector.

I made a video that demonstrates how you can tell something of the shape of a buried object from the audio signal alone.  In the video I used a quarter (just for comparison), along with a fairly large bolt, smaller screw, piece of an iron shipwreck spike, and an odd shaped piece of metal that responds a little bit like a fish hook.  I usually can identify fish hooks by the sound of the signal.

I used a Garrett ATX, although you would get the same type of results with many other metal detectors.  I used this same technique to identify target shapes before I ever got the ATX.  It worked exactly the same when using an Excalibur, for example.

I put the items on a board so you could see them well.  I also cut the sensitivity of the Garrett ATX down to less than half, just to temper down the signal, and used Motion mode, although the results would be similar using the Non-motion mode.

When you run your coil over a long straight object you will get a different type of signal depending upon the direction you move the coil.  You'll see that clearly in the video.

When you move the coil over the long object from one end to another, you'll get a double signal.  One towards each end of the object.  And if you move the coil over the object at 90 degrees to that, the signal will sound very much like a coin-shaped object.  So if you swing in one direction and get a regular signal and then change the direction of your sweep 90 degrees, you'll get something like a double signal.  You can also get an idea of the length of the object something by the amount of time between the double blips.  There will be more time between the blips when the object is longer.

Here is the link to the video.  There is really a lot of good useful information in this video if you really study the objects and signals they produce.  If you don't want to dig nails, you don't need a target ID meter on your detector.

If you move the coil too fast, you might not always catch the double blip.  You can gather additional information by varying how fast you move the coil too.

All of this is does not have to take extra time.  You can do it while pinpointing.

If you dig all targets, you don't have to do it at all, but if you are at a site littered with nails or other long narrow objects, you might want to be more selective.  This is a type of target ID that does not require a ID meter or any particular metal detector mode or function.

Notice that on the last object, there is a break.  I don't know what to call that thing right off, but you get what I'm calling a double blip when you sweep the coil in both directions.  The latch on the object is open.  You get the double blip in both directions, instead of just one direction like you would get with a bolt or nail or other long thin object.

My main point is that if you learn to analyze your signals, you can get a lot of information from just listening to the audio signal.  I always say that the human brain is a better processor than the detector's circuitry.  You can also learn to get a good idea of the targets depth and size from just the audio signal.

Happy hunting,

Friday, August 18, 2017

8/18/17 Report - Developing Storm Headed Our Way. Metal Detecting and Electrical Interference. Sand Transport Prediction Model.

Written by the TreasureGuide for the exclusive use of


Harvey is now a tropical storm.  It is headed towards Yucatan and Mexico.  There was another one not long ago that took about the same track.

The one behind Harvey (red) is the one that looks to be headed towards Florida.  At this point it has a 70% chance of developing into a cyclone in the next 48 hours.

As you can see, the third will probably head north and out into the North Atlantic.

There is a good chance that the one behind Harvey will affect out beaches.  We haven't had much of anything to stir up the beaches all year.

MagicSeaWeed predicts an increase in the surf up to three or four feet by Tuesday.  We'll see.


If you've done much detecting around the Treasure Coast, you might have noticed that there are some places where your detector becomes very erratic or noisy.  There is a place like that south of Turtle Trail.  There is another south of the Rio Mar beach access.  There is another north of Amber Sands beach access.  And there are times when Pepper Park can produce some electrical interference, but not as consistently or as much as the other sites that I mentioned.

Wikipedia says, Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction. The disturbance may degrade the performance of the circuit or even stop it from functioning. In the case of a data path, these effects can range from an increase in error rate to a total loss of the data.  Both man-made and natural sources generate changing electrical currents and voltages that can cause EMI: automobile ignition systems, mobile phones, thunderstorms, the sun and the Northern Lights. EMI frequently affects AM radios.  It can also affect mobile phones, FM radios and televisions, as well as observations for radio astronomy.

You can also get electrical interference from electrical lines, underground utility cables and train engines.  The interference can be significant enough that you won't be able to detect some locations. Some metal detectors will be more sensitive to a specific source of interference than other detectors. Some detectors will allow you to detect much closer to overhead electrical lines or other sources of electrical interference than others.  That can be an advantage.

Some detectors have adjustments you can make that will allow you to work around various sources of interference.  Just the other day I took my Ace 250 and ATX to a yard that had overhead electrical lines as well as underground cables that caused interference.  Without making adjustments, the Ace could work much closer to the cables than the ATX, however the ATX has a Frequency Scan function that helped with that situation.

When working in the middle of the yard, the ATX was very noisy and sensitivity was severely reduced, but he ATX Frequency Scan function was able to find a frequency that eliminated much of the noise.  It then worked very well where there was previously way too much interference.

On the ATX you hold the searchcoil steady and away from any metal, and push the button to activate the Frequency Scan function.  It takes 35 seconds for the ATX to complete the scan and select a quiet operating frequency.  It worked well.

At the beach I've seldom used the Frequency Scan function, except a few times at some of the locations mentioned above.  There aren't as many sources of interference at the beach, but you'll find a good number in urban areas or residential neighborhoods.


Darrel S. said the weight found by Grant of the Capitana a few days ago, Matches the weight found on Green Cabin Wreck several years, ago. It had 6M on it, and this one 4M.  

Thanks Darrel.  I didn't remember that.


I noticed that in my videos and previous posts I kept typing Ace 150 when it should have been Ace 250.  I made those corrections.


Here is a scientific article on cross-shore suspended sand and bed load transport on beaches.  It is very technical and difficult to read.

Here is the link.


Keep watching for weather news and a possible change in beach detecting conditions.

Happy hunting,

Thursday, August 17, 2017

8/17/17 Report - More 1715 Site Finds From the Capitana. 1802 Shipwreck With Interesting Cargo. Storms Forming in the Atlantic.

Written by the TreasureGuide for the exclusive use of

Cole Smith of the Capitana Crew with Encrusted Object
Photo submitted by  Captain Jonah Martinez

Captain Jonah said, The cargo hook was found by Cole Smith newest member of the Capitana...

Congratulations Cole, and thanks for sharing Jonah!

Cole also found a class ring. Not the class of 1715 - but 1968.

Cole's 1968 Class Ring Find.
Things of various ages and sources sometimes get mixed together.  Just because something comes from a known shipwreck site doesn't mean it came from the shipwreck.  That is obviously the case with this class ring.  The ring looks like it has been lost for a good number of years.

Nice thing about diving all day is that your hands look like you just got a manicure - not like relic hunters.   Relic hunters usually look like they could start a seed garden under their fingernails. ( :


Continuing with that theme, I found an article about a shipwreck that was lost in 1802 that was carrying antiquities taken from ancient Greece.

Chess pawns, combs and a toothbrush are some of the new findings brought to light by the underwater excavation of the wreck of the ship “Mentor” that sank off the island of Kythira in 1802...

Divers On The Site of the 1802 shipwreck of the Mentor.
Source: See GreekReporter link below.
The ship, which was carrying antiquities plundered from the Parthenon by British diplomat Lord Elgin, was bound for England via Malta but sank at the entrance of the port of Avlemona southwest Kythera...

For more about that, here is the link.

Another example how items from various sources and ages can be found together.


The Atlantic is hearing up.  The system approaching the West Indies (red) had an 80% chance of becoming a cyclone in the next 48 hours.  The next system has about a thirty percent chance.

Gert is way north now.

I'll be posting a projected path on those systems before long.

Happy hunting,

Wednesday, August 16, 2017

8/16/17 Report - New 1715 Fleet Find By Crew of Capitana. Search For Lost Merchant. Attitudes Towards Historic Items and Artifacts.

Written by the TreasureGuide for the exclusive use of

Capitana Diver Grant Showing His Recent Find
Photo submitted by Captain Jonah Martinez
As you know, salvage season is in full swing.  The crew of the Capitana has been finding artifacts, including the scale weight shown in the photo above.

Congratulations Grant.  Great find!

And thanks to Capitana captain Jonah Martinez for sharing the great photos with us.

Bronze 4M or Marcos Scale Weight Found by Grant Photo submitted by Captain Jonah Martinez

I'll post more recent 1715 Fleet finds probably tomorrow.


The crew of the Dare has been working 24/7 looking for the shipwreck code-named Lost Merchant.  After surveying about 220 nautical miles with both a magnetometer and side scan sonar.  A number of targets have been identified for further investigation.


Three New Areas To Watch.
Hurricane Gert is now well north of us, but there is a parade of systems coming off of Africa.  It is too early to know if they will affect Florida.  I'll keep an eye on them.


Never RememberSource: CNN News Video

This historic Confederate statue was torn down.  I wonder how far this will go.  Could there come a time when confederate or other historic artifacts from other times or movements be treated the same?  Is this a sign of things to come?  Could there come a time when the Washington Monument or other statues or monuments, or even dug artifacts, will be similarly regarded or erased from the landscape and history?

Happy hunting,

Tuesday, August 15, 2017

8/15/17 Report - Numismatic Archaeology of North America. Ship's Store Tokens. Determining the Source of Silver Coins. New Weather In The Atlantic.

Written by the TreasureGuide for the exclusive use of

Here is a good book.  You can read a sample free online.  The title is Numismatic Archaeology of North America: A Field Guide.

You might want to look at some of the later chapters first because there is a limit to how much you can read as a free preview.

Below is just one of many illustrations from the book that I found interesting.



Maybe you've found something that looks like a coin but you can't identify it.  I have. This is an entire class of coins or tokens that you should know about.  As the book says, such tokens might be found in port cities or where sailors live.

There seems to be a lot of good interesting information in that book.

Click here to take a look at the free preview.


Researchers in Germany and Denmark analysed the chemical composition of 70 silver Roman coins dating from about 310 BCE to 101 BCE, spanning either side of the war.

"Before the war we find that the Roman coins are made of silver from the same sources as the coinage issued by Greek cities in Italy and Sicily. In other words the lead isotope signatures of the coins correspond to those of silver ores and metallurgical products from the Aegean region," said Katrin Westner of the Institute for Archaeological Sciences, Goethe University, Germany...

Later coins came from silver mined in what is now Spain.

Here is the link to read more about that.



Gert is up by North Carolina now, but there are two more systems to watch out in the Atlantic.  Either or both of those could possibly come our way.  It will be a while before we know what happens to them.

That is all for today.

Happy hunting,

Monday, August 14, 2017

8/14/17 Report - South Hutchinson Island Beaches and Conditions. A Few Finds. Tropical Storm Gert.

Written by the TreasureGuide for the exclusive use of

I took a look at a few beaches along South Hutchinson Island this morning.  Beach detecting conditions were generally poor.

Most beaches had loose shelly sand with a steep slope.  Other beaches were more flat and had a layer of fine sand over the course sand.

As you can see, the surf was flat this morning.  One of the salvage boats came out of the Fort Pierce Inlet around 8:30.  I didn't see any of the others.

Seaweed was common too.

I hadn't been out much lately, but things have not changed much either.

Below are some more pictures of South Hutchinson Island beaches.

I didn't hunt very much.  Mostly I just looked at the beaches, but I did detect a little.  No matter how hard the beaches have been detected, there is usually a little something left, like the crusty coins shown below.

Two Crusty Pennies.

I don't know why they remained on the beach so long.  Maybe because people aren't bothering with zinc pennies, or maybe it was because there was a screw between them, which could have protected them.  They were the only coins I found, although I only detected for a short while - probably not even twenty minutes.

Also the following small gold earring was found at good depth - probably about seven inches.


There is now a named tropical storm - Gert.  She won't come our way though.  She is headed north and out into the Atlantic.


The surf on the Treasure Coast will remain two feet and under for several days.

Happy hunting,