Lech Laszkiewicz wrote:

What lights should be displayed at night by an airship not under power
being towed by a marine tug?

The same lights that would be used for an aeroplane under tow. The lights
must be on day and night
and flashing to indicate towing.  I thought Lech you already knew this. I
am sure when you were airborne you must have had the odd tow to get you
home. When airborne and stationary the craft will be illuminated but no
flashing lights. If stationary for long periods it would be better to make
arrangements to bale out, making sure to attach a torch to the left
shoulder. You will use the torch to send "help" in morse code so that your
descent can be monitored.

Quote from " O'Quigley-Mc Namara" handbook for stranded aviators, kite and
balloon fliers.
Available at any high quality book shop, there is also a gramaphone record
available for those that tend to go cross eyed when reading. Price 12
shillings, 3 pence and a half penny.
(12s3 1/2d)

de G3KAU