noun
search party
A group organized to search for missing persons, lost items, or disaster victims. Often used in news reports and formal announcements.
警察は山に捜索隊を派遣した。
The police dispatched a search party to the mountain.
遭難者のために捜索隊が結成された。
A search party was formed for the missing person.
救助隊 is a rescue team focused on saving lives, whereas 捜索隊 is primarily a search team that may or may not perform rescue operations.
Compound of 捜索 (search) + 隊 (party, squad). The kanji 捜 means 'search', 索 means 'rope' or 'search', and 隊 means 'group' or 'corps'.