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Emerging from the crossroads of robotics, artificial intelligence, and marine science are water drones, or unmanned aquatic vehicles (UAVs). These innovative devices are revolutionizing the way we explore and monitor our precious bodies of water, providing a novel perspective on the deep, the inaccessible, and the intriguing.

Water drones come in a wide array of designs tailored for different aquatic environments. The most common categories are surface water drones, which navigate across water surfaces, and underwater drones, built to probe the depths of oceans, lakes, and rivers.

A simple C program to encode and decode Base64 strings without using any third-party libraries:

To convert a HEX-encoded UCS2 string to text with support for the Ukrainian language, you'll need to decode the HEX representation, convert it to UTF-16, and then further convert it to UTF-8 encoding. The following C code demonstrates how to accomplish this: 

To check an RSA1024-SHA1 signature of a string using a certificate (.crt file), you need to follow these steps: