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Figure 1. ROV searching and salvaging a target.

Figure 2. 3D effect diagram of search and rescue ROV.

2. DESIGN OF ROV SYSTEM FOR OFFSHORE UNDERWATER SEARCH AND RESCUE

2.1. Main specifications
The ROV system dimensions are 900 mm × 600 mm × 600 mm. It is a small search and rescue ROV capable
of exploration, detection, and grasping operations. Its main technical specifications are shown in Table 1.

2.2. ROV surface operation box design
The surface operation part is the shore-based display. The shore-based display and control system belongs
to the user interaction part. It is the core part to realize ROV information collection, display, and control.
[9]
ROV communication and control [7,8] is a key step in the design process of an ROV. Ghilezan proposed a re-
motely controlled ROV (remotely controlled vehicle) based on the Arduino Mega 2560 microcontroller, which
acquires sensor data and controls direction and acceleration. It can directly control the ROV system and dis-
play the target search and rescue scene in real time. The hardware is PC-104 (see Figure 3), and the software is
a display and control system independently developed based on the C# platform. The shore-based display and
control systemcommunicateswith the ROVbodythrough the load-bearingphotoelectric compositecable and
directly displays the underwater camera information, the current state of the ROV body, and the underwater
acoustic detection-related control and measurement data through the display and control software. In addi-
tion, it can remotely control the ROV body. The display and control software in the system integrates many
functions such as comprehensive ROV control, video monitoring, remote control, and underwater acoustic