They also fished the Indian River, called the "Rio de Ais" by Spanish explorers. Frame languages such ais KL-ONE have a rigid semantics. A brief overview of the history of the AIS follows. A number of manufacturers offer AIS receivers, designed for monitoring AIS traffic. The technical committees have developed and published a series of AIS product specifications. See "External links" below for a list of internet-based AIS service providers. The degree of sexual ambiguity varies widely in persons with incomplete AIS. The adult AIs are higher than the U.S. RDAs. Several national sports organisations have located their national centres for excellence at the AIS. Near the top it encounters two other AIs, The Shepherd and Samsara. The attitude indicator is designed to look very much like traditional mechanical AIs. All the major features of the AIS arose early and quickly. A standard for AIS base stations has been long-awaited. This is in general use by AIS devices. These AIs are lower than the U.S RDAs.