Here you have English training manual for seafarers.
Link to the document:
https://drive.google.com/file/d/1ODwuuPNzeqZDPowr6O1piZUmdPSruPs5/view
Link to the video:
https://www.youtube.com/watch?v=zoyiFAsFC60&lc=UgyGj5yf8M148lNyN954AaABAg