a display;

a high-accuracy positioning unit comprising at least one of a positioning unit capable of positioning accuracy of at least substantially 50 centemeters or a positioning unit capable of utilizing L5 positioning signaling;

a detonator identifier reader:

at least one processor; and

at least one memory comprising computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the hand-held apparatus to at least:

determine the location of the hand-held apparatus based on signaling received by the high-accuracy positioning unit;

in response to the determined location of the hand-held apparatus corresponding with a location of a bore hole in a stored blasting plan:

identify an electronic detonator based on an identifier of the electronic detonator read by the detonator identifier reader; and

update the stored blasting plan to indicate that the identified electronic detonator has been set in said bore hole.