Defence Minister Rajnath Singh Monday said warfare is now measured in hours and seconds, not months, as satellites, drones and sensors redefine the nature of conflict. He also said cyber and electronic warfare are no longer hypothetical threats but present-day realities. “A nation may attempt to paralyse our systems not with missiles, but through hacking, cyber-attacks and electronic jamming,” Singh said. Singh said that while land boundaries are permanent, clearly marked and relatively predictable, maritime borders are fluid and constantly shifting due to tides, waves and weather. Maritime security is far more complex and unpredictable than land borders and demands constant vigilance,” he said.