Transport i infrastruktura · 23/08/2011
NIST to Revocate TSO Authorizations for Underwater Locating Devices (Acoustic) (Self-Powered)
The National Institute of Standards and Technology (NIST) plans to revoke Technical Standard Order authorizations for Underwater Locating Devices (Acoustic) (Self-Powered) manufactured to TSO-C121 and TSO-C121a specifications, as a new standard with a longer minimum operating life is set to be released.