 In response to these threats, the PCG stepped up routine checks on vessels in Singapore's territorial waters, in particular on passenger ferries returning from regional destinations.Since late-2004, PCG officers have given additional training in the areas of boarding vessels for this purpose and are equipped with skills in the detection of explosives, drugs and fraudulent documents, courtesy of the Immigration and Checkpoints Authority's (ICA) provision of much assistance and training towards PCG in such an endeavour.The PCG also engages in search-and-rescue operations at sea and provided crucial assistance in the recovery of the stricken USS "John S. McCain" in Singapore's waters in 2017.