Inmarsat B is a digital system designed to supersede the now defunct Inmarsat A, offering greater capacity, higher quality and lower prices than its predecessor.

Inmarsat B offers digital satellite communications for: voice, telex, fax (9.6 Kbps), data (9.6 Kbps), duplex high speed data, (56/64 Kbps), shore to mobile high speed data and Internet access. The digital system allows for lower costs for users due to more effective satellite capacity utilisation.

High Speed Data (HSD) and Duplex High Speed Data (DHSD)

Inmarsat B DHSD (56/64 Kbps) is ideal for high volume data communication users such as seismic surveyors, research vessels and oil and gas exploration craft. High Speed Data is highly effective for transfer of compressed and slow-scan video — of vital importance when you need on-air technical or telemedical assistance.

Marlink offers HSD via Inmarsat B in all ocean regions. As the world’s largest supplier of Inmarsat B services, we are at the forefront of developing advanced data solutions and new services via Inmarsat B.

Safety (GMDSS)

The Inmarsat B system is approved by the International Maritime Organisation (IMO) for the Global Maritime Distress and Safety System (GMDSS). GMDSS has been compulsory for all passenger and merchant ships over 300 DWT since 1999.