The greater part of the passage, as Jack had explained, had to be carried
out in broad daylight, with the consequent likelihood of discovery by
enemy aircraft or submarines. This risk was largely countered by the
escort of all the scouting escort under Admiral Keyes' command.

On arrival at a certain position, it being then apparent that the
conditions were favorable and that there was every prospect of carrying
through the enterprise on schedule, a short prearranged wireless signal
was made to the detached forces that the program would be adhered to.

On arrival at a position a mile and a half short of where Commodore
Boyle's force was stationed, the whole force stopped for fifteen minutes
to enable the surplus steaming parties of the block ships to be
disembarked and the coastal motor boats slipped. These and the motor
launches then proceeded in execution of previous orders. On resuming the
course, the Warwick and Whirlwind, followed by the destroyers, drew ahead
on either bow to clear the passage of enemy outpost vessels.

When the Vindictive arrived at a position where it was necessary to alter
her course for the Mole, the Warwick, Phoebe and North Star swung to
starboard and cruised in the vicinity of the Mole until after the final
withdrawal of all the attacking forces. During the movement and through
the subsequent operations, the Warwick was maneuvered to place smoke
screens wherever they seemed to be most required, and when the wind
shifted from northeast to southwest, her services in this respect were
particularly valuable.

The monitors Erebus and Terror, with the destroyers Termagant, Truculent
and Manly, were stationed at a position suitable for the long range
bombardment of Zeebrugge in co-operation with the attack.