Final answer:
Detonators such as explosive boosters can be used to initiate detonating cord containing high explosives like PETN or RDX.
Step-by-step explanation:
The type of detonator recommended to be used to initiate detonating cord can vary depending on the specific circumstances and requirements. One commonly used type is an explosive booster, which is a starter explosive that triggers the detonation of TNT. Detonating cord typically contains a core of high explosives, such as PETN or RDX, which are sensitive to shock or friction. These high explosives can be initiated by a high-velocity initiator or efficient concussion.