The Search and Rescue (SAR) system and its functions are essential for location identification of spacecraft crew members. The existing (COSPAS-SARSAT) system provides distress alarm and position identification everywhere in the world. The existing COSPAS-SARSAT system is not able to determine location of emergency beacon due to large time delays and Doppler effects. To avoid Doppler effects in LEO orbit and longer delays in GEO orbit, SAR payloads on-board with GPS/GLONASS/Galileo MEO satellites to augmented COSPAS-SARSAT system in terms of service interiority, accuracy, and accessibility requirements. India has developed GPS-aided Geo augmented Navigation (GAGAN) for improving the positional accuracy of single-frequency GNSS users. The future SAR-based NavIC and GAGAN payloads would be very useful to improve the positional accuracy of people in emergency. There is a necessity of investigating the suitable search and rescue downlink broadcasts by GNSS in L-band. The location identification of spacecraft crew landing is a complicated task and requires fast computation within short time and with least positional errors. A suitable Short Message Service (SMS) can be developed to establish a bidirectional text communication between Space Segment and PBL users. The GNSS and SAR-based simulation tools, such as GPS PPP RTK, GAMP, Bernese GPS data processing software, and GLAB can be utilized. Deep learning-based ionospheric models, multipath, and ionospheric scintillation mitigation techniques can be developed in water beacon transmission environments. The outcome of this review article would be useful to investigate feasibility of NavIC GNSS for human spaceflight landing purposes.