@Mike Juliet Kilo: great work! It certainly raises a few questions but hopefully this will move the story on (be careful what you wish for, I know...).
I found a UA this afternoon whilst flying my new Federal Assault Ship but have now sold it (see Operation Scour report below) so I would have encountered a different signal completely had I recorded it (not sure what video recording would work with my laptop and not slow it down too much, so I just take screenshots). As to why the UAs are transmitting a signal in Morse that decodes into an image of our ship, I don't think it's possible for us to say whether they are trying to communicate with us or send information on us elsewhere (or both). I also have to wonder why there are suddenly so many of them - are they being deployed by a stealth ship that has, so far, avoided detection by everyone? Eyes on Merope are still needed!
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Operation: Scour report
Commander Reporting: Edelgard von Rhein
Ship type: Federal Assault Ship
Ship name: Lead Carpet
Unknown Artefact aboard: YES (acquired en route to Merope in HYADES SECTOR BV-Y C13)
Wingmates: None
Mode: Open play
Inner Route Surveyed: Merope 2 to Merope 5/6, Merope 5/6 to asteroid clusters 1,2,4,8
Honk results: none (repeated at ~1000ls intervals starting 500ls from Merope 2)
Summary of craft encountered along route:
1) group of three ships in USS (>1000ls from Merope 2): Hauler; Eagle; Cobra. Hauler had no cargo. Other two ships attacked after scanning me, both destroyed, no cargo dropped.
2) Medical Transport wing of 4 in SSS (<150ls from Merope 5/6): Python with three Vultures escorting. Unusual dialogue recorded (see below). No provocotive action taken (including use of cargo scanner) in the hope of observing further dialogue; followed the group for approximately 2-3mins., after which time all four vessels hyperspaced away (destination not recorded).
Additional signal sources investigated:
WSS near Merope 5/6: one Rare Artwork amid wreckage of ship, possibly a Vulture. Scooped for further analysis.
Salavagable Wreckage: appeared immediately after setting a course for Merope 2 after refuelling. 5 Occupied Escape Pods located amid wreckage of at least one ship (only identifiable parts were of Vulture origin). Scooped all 5 in order to hand over to the authorities for medical assistance/debriefing.
Other observations:
After scooping the UA I returned to supercruise to refuel and was interdicted before refuelling could be completed by a lone Vulture, which claimed to have come a long way for the contents of my hold. I submitted and in normal space it scanned me and opened fire. It did not drop any cargo of its own upon destruction. One other interdiction attempt was made against me after this, which I evaded by jumping to hyperspace. No interdictions occurred on my way back from Merope.
Damage to ship systems occurred at seemingly regular intervals whilst the UA was on board. Utility modules appeared to be especially vulnerable to this damage, in particular my heat sink launcher, which endured twice the degradation of any other module. In contrast, my fuel scoop, power plant, life support and large weapons endured many bursts of damage and were not degraded below 90%. My detailed surface scanner was the only undamaged component. Suspect component mass may play a role in vulnerability to UA corrosion.
The UA and all other items recovered were turned over to my contact at Barnes Horizons, BD+55 1142. As a Federal, High-Tech, Scientific Outpost, they are amongst the best-equipped in all human space to make further investigations and there is also a plentiful supply of medicines there to assist the occupants of the recovered escape pods.