What is a key feature of anti-shipping weapons?

Anti-shipping weapons are designed specifically to engage naval vessels effectively, and operating at low elevations is a characteristic that enhances their effectiveness. This feature allows these weapons, such as anti-ship missiles and bombs, to remain below the radar horizon, making it more challenging for enemy vessels to detect them until they are very close. By flying at low altitudes, the weapons can also take advantage of the sea surface's masking effects, increasing the likelihood of penetration against ship defenses and allowing for a more stealthy approach.

In contrast, while other options might touch on aspects of weaponry, they do not accurately reflect the primary operational characteristic of anti-shipping weapons. For instance, accuracy is a critical design focus for most modern systems, and many can be very precise. Ground support is a separate domain primarily associated with close air support missions that target land forces, and requiring close proximity would be impractical for effective use against enemy ships. Thus, the operational approach primarily emphasizes low-level engagements to maximize success in targeting maritime assets.