When should a referee notify the captains and coaches of the remaining time if there is no game clock available?

The answer regarding when a referee should notify captains and coaches of the remaining time when there is no game clock available is correct, as it emphasizes the importance of maintaining awareness of the game's flow, especially during critical moments. By providing this information approximately 4 minutes before the end of each half, the referee ensures that both teams are aware of the impending conclusion of the half. This communication helps teams manage their strategies and play more effectively, as they can make informed decisions about offense, defense, and time management. Keeping all participants aligned about the timing furthers the spirit of fair play and helps maintain the integrity of the game.

Other options lack the proper timing to be truly effective for managing the game. For instance, notifying teams at the start of each half provides no valuable information about end-of-half strategy. Similarly, updates every 5 minutes may not align with the changing dynamics of the game, potentially leading to confusion. Waiting only until halftime would be too late for teams to adjust their strategies effectively for the concluding moments of the half. Thus, notifying the captains and coaches about 4 minutes before each half strikes the right balance in communicating vital game-time information.