5
DEPTH
The GEMINI-3 was designed to locate large, deep objects such
as an iron chest, pipe or an ore vein. It will not detect small coin-
sized objects. A quart jar full of coins, however, may be detected
one-to-three feet deep. A 55-gallon drum may be detected as
deep as 10 feet. A very large object, like an automobile, may be
detected at 20 feet or more.
The ability of the GEMINI-3 to detect objects at various depths
depends on several factors:
1. Ground Mineralization:
The penetrating power of the
GEMINI-3 is adversely affected by the presence of
magnetite (a black iron oxide) and wet conductive
mineral salts. For example, an object that can be
detected at 15 feet in neutral ground may be
detected no deeper than 5 feet in highly mineralized
ground.
2. Size and Depth of Object:
A 4-inch diameter target
will produce signal 64 times stronger than a similar
1-inch diameter target at the same depth. An object
1-foot underground will produce a signal 4,000 times
greater than the object 4 feet deep.
3. Length of Time Object is Buried:
An object that has
been buried for a long time may be easier to detect
than a newly buried object. Rust and other oxides as
well as mineralization caused by the interaction of
the metal with soil chemicals are good conductors
and aid detection.
4. Shape of an Object:
Ring or looped shaped objects
lying flat produce the best results. Flat or dish shaped
targets are also easy to detect. Rod shaped objects,
especially when scanned on end, are very difficult
to detect.
5. Operator Skill:
Probably the most important factor of
all, practice over known buried targets is essential.
20
LET’S PRESERVE OUR TREASURED SPORT!
Laws governing the use of metal detectors are common in some
areas. In many countries, the use of metal detectors is illegal or
severely restricted. DON’T LET THIS HAPPEN IN YOUR COUNTRY!
• Always check Federal, State, County and local laws before
searching.
• Respect private property and do not enter private property
without the owner’s permission.
• Take care to refill all holes and leave no damage.
• Remove and dispose of any and all trash and litter found.
• Appreciate and protect our inheritance of natural resources,
wildlife and private property.
• Act as an ambassador for the hobby, use thoughtfulness,
consideration and courtesy at all times.
• Never destroy historical or archaeological treasures.
• All treasure hunters may be judged by the example you set;
always conduct yourself with courtesy and consideration of
others
.
LET’S PRESERVE OUR TREASURED HOBBY
TREASURE HUNTERS’ CODE OF ETHICS
