A day of sightseeing turned into a nightmare on Wednesday when an Indian naval speedboat lost control and crashed into a passenger ferry off the coast of Mumbai, killing 13 people, including three naval personnel.

The ferry, named Neelkamal, was packed with over 110 passengers heading to the famous Elephanta Caves, a UNESCO World Heritage Site, when disaster struck at 4 p.m. The naval speedboat, carrying five crew members, was conducting engine trials when it suddenly malfunctioned. Eyew...