What should divers do if they encounter a strong underwater current?

When divers encounter a strong underwater current, swimming diagonally across the current is the most effective strategy. This approach allows divers to maintain forward progress while minimizing the impact of the current's strength directly opposing their movement. By positioning themselves at an angle, divers can leverage their effort efficiently, reducing fatigue and the risk of being swept away.

Swimming directly against the current can lead to exhaustion and may ultimately be ineffective, as the current can overwhelm the diver’s strength. Floating and waiting for assistance might be suitable in some situations but could leave the diver vulnerable to further drift or other hazards. Seeking shelter near the seabed may also provide a temporary reprieve but does not typically address the immediate need to move toward safety or exit the current's influence. Therefore, swimming diagonally across the current represents a proactive and strategic response to effectively manage the situation.