0 someone whose hobby is using a metal detector (= special machine) to try to find valuable metal objects in the ground -- 金属探测爱好者（爱好用金属探测器，在地下找有价值的金属物品的人）
This small minority of metal detectorists are sometimes referred to as night hawks.
Without the portable antiquities scheme we should be back to square one, and the incentive for metal detectorists to engage positively would be gone.
Responsible detectorists do have a very important part to play in our national heritage, for the benefit of us all.
Usually they find a penny or 10p piece that another metal detectorist dropped earlier; but on some occasions they start to dig things up.
I repeat that responsible metal detectorists have a great contribution to make in the future recovery of our heritage.
And many metal detectorists are following in the tradition of that enthusiastic amateur.
It is not directed solely at metal detectorists.
But alas, while there are many very responsible metal detectorists, there are others who do not care and who ignore the code of conduct.
