5. Floats along. (6)
7. Rougher. (7)
9. Pare or whittle away to a wild end? (7)
11. Axial rotating shaft needed for drilling the darn elm growing wild. (7)
13. Sudden fluctuation, of waves and voltage. (5)
14. Confederation of European Union Shipmasters' Associations. (acr.) (5)
15. Becoming an expert on ship. (9)
16. Navigation system. (acr.) (5)
18. Supports for a mast or pillar. (5)
21. Submarine weapon. (7)
24. Trapping. (7)
26. Culinary art. (7)
27. Linear distance. (6)

1. Air vessel system to deliver wash water on ship. (10)
2. An elaborate and systematic plan. (6)
3. Currency unit in Middle East. (6)
4. Plait tresses. (5)
6. Sharp claw of a bird of prey. (5)
7. Cleaning with flowing water. (6)
8. Accuse of an offense. (6)
10. Situated. (7)
12. Forsake, leave behind. (7)
17. Antenna. (6)
19. Deceptive situation. (6)
20. Electrical devices for binary operations? (just on - off?) (8)
22. Avoid detection. (5)
23. Accommodate; favor. (6)
24. Length of piston movement. (6)
25. Awry; twisted. (5)