Declaration of Competing Interest statements were not included in published version of the articles that appeared in previous volumes of Journal of Ocean Engineering and Science.Hence,the authors of the below articles were contacted after publication to request a Declaration of Interest statement:

1.“Numerical investigation of modal and fatigue performance of a horizontal axis tidal current turbine using fluid-structure interaction” (Journal of Ocean Engineering and Science,2019;4:328–337) https:// doi.org/ 10.1016/ j.joes.2019.05.008.

2.“Comprehensive evaluation of marine waste heat recovery technologies based on Hierarchy-Grey correlation analysis”(Journal of Ocean Engineering and Science,2019;4:308–316) https:// doi.org/ 10.1016/ j.joes.2019.05.006.

3.“New sub-equation method to construct solitons and other solutions for perturbed nonlinear Schr?dinger equation with Kerr law nonlinearity in optical fiber materials” (Journal of Ocean Engineering and Science,2018;4:14–23) https:// doi.org/ 10.1016/ j.joes.2018.12.003.

4.“The influence of Thomson effect and inclined loads in an electro-magneto-thermoelastic solid with voids under green-Naghdi theories”(Journal of Ocean Engineering and Science,2018;3:253–264) https:// doi.org/ 10.1016/ j.joes.2018.08.003.

5.“Effect of Coriolis constant on Geophysical Korteweg-de Vries equation” (Journal of Ocean Engineering and Science,2019;4:113–121) https:// doi.org/ 10.1016/ j.joes.2019.02.002.

6.“An assessment of oil spill detection using Sentinel 1 SAR-C images” (Journal of Ocean Engineering and Science,2019;5:116–135) https:// doi.org/ 10.1016/ j.joes.2019.09.004.

7.“Basic models of farfield ship waves in shallow water” (Journal of Ocean Engineering and Science,2018;3:109–126)https:// doi.org/ 10.1016/ j.joes.2018.04.003.

8.“Two effective approaches for solving fractional generalized Hirota-Satsuma coupled KdV system arising in interaction of long waves” (Journal of Ocean Engineering and Science,2018;4:24–32) https:// doi.org/ 10.1016/ j.joes.2018.12.004.

9.“Development and validation of a coastal ocean forecasting system for Puerto Rico and the U.S.virgin islands” (Journal of Ocean Engineering and Science,2018;3:223–236) https:// doi.org/ 10.1016/ j.joes.2018.08.004.

10.“Generalized solitary wave solutions to the time fractional generalized Hirota-Satsuma coupled KdV via new definition for wave transformation” (Journal of Ocean Engineering and Science,2019;4:77–84) https:// doi.org/ 10.1016/ j.joes.2019.01.002.

11.“Optimization approach for a climbing robot with target tracking in WSNs” (Journal of Ocean Engineering and Science,2018;3:282–287) https:// doi.org/ 10.1016/ j.joes.2018.10.002.

12.“Efficient numerical scheme based on the method of lines for the shallow water equations” (Journal of Ocean Engineering and Science,2018;3:303–309) https:// doi.org/ 10.1016/ j.joes.2018.10.006.

13.“Measurement and validation of tsunami Eigen values for the various water wave conditions” (Journal of Ocean Engineering and Science,2019;5:41–54) https:// doi.org/ 10.1016/ j.joes.2019.08.001.

14.“Study of synthetic aperture radar and automatic identification system for ship target detection” (Journal of Ocean Engineering and Science,2019;4:173–182) https:// doi.org/ 10.1016/ j.joes.2019.04.002.

15.“Improvement of the ANFIS-based wave predictor models by the Particle Swarm Optimization” (Journal of Ocean Engineering and Science,2019;5:84–99) https:// doi.org/ 10.1016/ j.joes.2019.09.002.