route survey
3.In this paper, the marine route survey factors, such as water depth, bottom slope, soil shearing strength, tidal current and thunderstorm and their roles in the submarine fibreoptic cable engineering are introduced, and their roles and necessities in the cable construction are also appraised, which will make the combination of marine route survey with construction demand closer and the marine route survey be aimed at the cable engineering practice.
4.In hydrographic sweeping survey, considering that the surveyed route in design project description is a longer route which is composed of to geodetic coordinates, methods of Mercator projection, UTM (Universal Transverse Mercator) projection and Gauss-Kruger projection were adopted to eliminate the direction deviation of sweeping survey, and conform to the conventional ay of sweeping survey as well.
5.According to the interpretation of the acoustic survey records including side scan sonar and subbottom profiler and sample analysis,We found that there are some geoharzards as shallow-baried rock and its crop, san(lwave βr sand patch and sand dune developed on the route seafloor, they can interfere with the submarine optical cable laying operation and Injure the campleted submarine cable.
