First, the technical requirements
Second, zero buoyancy cable is mainly used for electrical connections between devices, requiring work in the underwater environment. According to the signal transmission requirements, the signal control line can be stranded single-core, multi-core, many pairs of different combinations of core components; according to the use requirements, can be vertical underwater robot cable form, horizontal seal form.
Third, the vertical underwater zero buoyancy cable: for the ship through the warehouse connection, high reliability of the use of the environment. Requires the cable end (axial) to withstand water pressure, in the eng_provisions of the test pressure and time, not allowed to water seepage.
Fourth, horizontal underwater zero buoyancy cable: non-wear underwater use of the environment. Requirements cable jacket (radial) to water pressure, in the eng_provisions of the test pressure and time, the cable insulation resistance does not decline, the cable is not deformed.
Fives, 
1, optical fiber composite cable, the outer eng_protection for the foam
Polyurethane eng_protective cover, the inner layer of the additional addition of linear tensile material,
2, the number of optical cable core: 2 RV1.5 (0.19 shares) soft cable (diameter 2.65MM)
+2 core single-mode armored fiber (OD 3MM)
2, tensile capacity: ≥ 300kg-500KG.
Six, technical parameters
1, the basic parameters of optical cable
1.1 Technical specifications: GB / T3956
1.2 Material standard: GB / T3953
1.3 cable core number: 2 RV1.5 (0.19 shares) soft cable (diameter 2.65MM)
+1 single 2-core single-mode armored fiber (OD 3.3MM)
  1.4 Fiber standard: G.657A2 / G652.D
1.5 Fiber attenuation requirements:

2, buoyancy eng_protective cover:
2.0 inner sheath for selection TPE PU foam
2.1 Outer eng_protective cover Material: PU
2.2 inner layer of wire filled with tensile material
2.3 Outer diameter: ≦ 13mm ± 0.2mm
2.4 Watereng_proof: 500 meters water without water
2.5 Cable specific gravity: ≦ 1.0 Specific gravity of water
2.7 Antiseptic: Alkali resistance> PH9, acid resistance 3, the warranty period: one year
4, tensile strength: ≥ 500kg
5, anti-bending: bending radius can be less than 6 times the outer diameter of the cable, can guarantee repeated delivery 1000 times.
6, cable withstand voltage: 450 / 750V