##### Fun fact: we were the 10th team to solve this one!##### ##### We started with Googling the “boxing croc”, since we all had no idea what it was##### > Google info card on the “boxing croc”, or rather, the “Big Boxing Crocodile”. There is a photo of a crocodile statue wearing boxing gloves, as well as a screenshot of Google Maps showing the boxing croc’s location. It is a tourist attraction in Humpty Doo, Australia, and its address is 326 Arnhem Hwy, Humpty Doo NT 0836, Australia.##### ##### Looking at a map, we noticed that Darwin International Airport was nearby, so it was likely that any aircraft going over the Boxing Croc was probably heading into or out of Darwin.##### ![](https://codimd.s3.shivering-isles.com/demo/uploads/upload_c241a5cfea9f7126987de715ce2c0f11.png)##### ##### Next, we looked at a list of American refueling planes, hoping to find a model so we could find flight data for them. This was inconclusive, especially since flight trackers only showed flights from the past 7 days.##### ##### We also found this totally not sketchy site (http://www.planeflighttracker.com/2014/04/united-states-military-aircraft-in.html) for finding the model codes for military aircraft.
![](https://codimd.s3.shivering-isles.com/demo/uploads/upload_8e12b8c3761920882e49408680e5b668.png)
##### ##### However, a whole bunch of googling later, we still found nothing.##### ##### We happened upon an article about an [Australian/American Joint Air Force exercise](https://www.pacom.mil/Media/News/News-Article-View/Article/2336270/increasing-interoperability-b-2s-b-1s-join-us-marine-corps-australian-defence-f/) that happened near the given date, and it mentioned a particular refueling plane, the Boeing KC-135R Stratotanker. with model number K35R.##### ##### Still, flight trackers had no historical data going that far back, so we had to get a 7-day free trial for [RadarBox](https://www.radarbox.com/). Searching for all flights with the model K35R, we looked for flights around September 1st.##### ![](https://codimd.s3.shivering-isles.com/demo/uploads/upload_1bc3c3b16122fce965c963234a32f1c7.png)##### ##### We eventually found a flight whose path looked like it went over where Boxing Croc would be:
![](https://codimd.s3.shivering-isles.com/demo/uploads/upload_f7d9c48c26d3350edd0bd58301d98526.png)
##### ##### Googling the plane registration number: 58-0086 then led to https://planefinder.net/data/aircraft/58-0086, revealing the final flag.##### **Flag**: DUCTF{16-07-59}  **Tools**: Google Maps, Plane Flight Tracker, RadarBox, Plane Finder