AohaiLink SmartGuard VDES Base Station Model: AT-B20 Category: Shore-based Maritime Communications Equipment Designed for shore-based maritime communications and information services, the product supports the reception and transmission of AIS, ASM and VDES-related information. When integrated with shore-based networks and service platforms, it supports vessel traffic situational awareness, maritime supervision and emergency communications. Key Compliance: Complies with ITU-R M.1371-6, ITU-R M.2092-2, IALA G1139, IEC 61162-1、62320-1.