Hidden Dangerous Goods are often indicated by which characteristic?

• A. They may be included in cargo with general descriptions and require vigilance
• B. They must be explicitly labeled as dangerous
• C. They are only medical supplies
• D. They are allowed without restrictions

Answer: (A)

Hidden dangerous goods are identified by the way they’re described rather than by clear, explicit labeling. They may be tucked into cargo under general, vague descriptions, so the hazardous nature isn’t immediately obvious. Because the shipper’s paperwork or the description doesn’t reveal the hazard, cargo handlers and crew must be especially vigilant to verify contents beyond what’s written, inspecting packaging, markings, and available indicators. This is why the characteristic that fits best is that they may be included in cargo with general descriptions and require vigilance. The other options don’t fit: explicitly labeled dangerous items would not be hidden, medical supplies are not the only source of dangerous goods, and dangerous goods are not allowed without restrictions—their classification, packaging, labeling, and quantity rules always apply.