天和防务：水下业务主要聚焦水下传感器和水下无人自主航行器两个方向

Group 1 - The core focus of the company is on underwater business, specifically in underwater sensors and underwater unmanned autonomous vehicles [2] - Underwater sensors are aimed at ocean environment monitoring, designed to sense various parameters of the underwater environment to support the operational needs of various underwater platforms [2] - Underwater unmanned autonomous vehicles, similar to aerial drones, can carry different equipment to perform multiple underwater tasks such as reconnaissance, anti-submarine operations, underwater target detection, and training [2]