Numerous ROUVs were subsequently developed directly based on experience gained from the Sea Dragon series.
Although numerous types of ROUVs were developed in China in the 1980s and 1990s, they were limited by maximum operating depths of less than 1,000 meters, which is not enough for tasks like deepwater exploration and repairs.
The Institute of Underwater Engineering (水下工程研究所) of Shanghai Jiao Tong University (SHJTU) was named as the contractor.
To avoid the loss of the ROUV in bad weather, as in the case of Kaikō in 2003, a specially designed mechanism was incorporated to prevent such mishaps.
[12][13][14][15][16] Specifications:[12][13][14][15][16] Sea Dragon 4E is designed mainly for underwater engineering tasks, such as surveillance, inspection, cleaning, cutting, welding, and construction work of oil platforms and hydraulic projects.
[20] Specifications:[20][21][22] JTML-02 is an ROUV designed for digging tasks on the seabed as part of construction work when laying underwater power and communication cables.
[26] Specifications:[26] JTMP-03 is an ROUV designed for digging tasks on the seabed as part of construction work when laying underwater cables and pipelines.
[27] Specifications:[27] JTMP-04 Walrus (Chinese: 海象; pinyin: Hai-Xiang) is an ROUV designed for digging tasks on the seabed as part of construction work when laying underwater cables and pipelines.
It is equipped with LED lights, 2 CCD cameras, and Canadian Imagenex Model 881 digital multi-frequency imaging sonar.
It is equipped with 2 manipulators, LED lights, 2 CCD cameras, and Canadian Imagenex Model 881 digital multi-frequency imaging sonar.