You have to check 4 objects: [object=278357], [object=278809], [object=278359], [object=278361].
[object=278357] is near the flag nearby.
[object=278809] are in the east part of Waning Glacier.
[object=278359] is north on the hill.
[object=278361] is in north-west part near the cave.
/way Tiragarde Sound 42.14 15.45 Bloodied Boot
/way Tiragarde Sound 43.67 14.54 Roughneck Supplies
/way Tiragarde Sound 41.65 13.87 Roughneck Axe
/way Tiragarde Sound 39.65 13.34 Discarded Rucksack
Where'd They Go quest video: https://www.youtube.com/watch?v=qT4EAPdH3oQ
This quest is a part of Roughneck Camp sidequests in Tiragarde Sound.
ID
Quest
Sidequest Chain
Questgiver
Subzone
Video
150
Roughneck Camp
Norwington Estate
https://youtu.be/gGMhI9RBVSU
151
Roughneck Camp
[npc=129003]
Roughneck Camp
https://youtu.be/LCN_DCpQqFg
152
Roughneck Camp
[npc=129003]
Roughneck Camp
https://youtu.be/_llkV5MlAN0
153
Roughneck Camp
[npc=129170]
Roughneck Camp
https://youtu.be/46fDFhAdauc
154
Roughneck Camp
[npc=129170]
Roughneck Camp
https://youtu.be/LGsvA_90Htw
155
Roughneck Camp
[npc=129578]
Westwind Weald
https://youtu.be/FlHF_D3OkaY
156
Roughneck Camp
[npc=129003]
Roughneck Camp
https://youtu.be/QZfemjmYh6s
157
Roughneck Camp
[npc=129291]
Waning Glacier
https://youtu.be/ay83YMBRpzY
158<
Roughneck Camp
[npc=129291]
Waning Glacier
https://youtu.be/qT4EAPdH3oQ
159
Roughneck Camp
[npc=129655]
Waning Glacier
https://youtu.be/QyS7QDoFNZM
160
Roughneck Camp
[npc=129655]
Waning Glacier
https://youtu.be/PLsgbfKzKzQ
161
Roughneck Camp
[npc=129003]
Roughneck Camp
https://youtu.be/ARsQ4TzS_0E
162
Roughneck Camp
[npc=130478]
Cliffside Hot Springs
https://youtu.be/_R9MZfnFDyE
163
Roughneck Camp
[npc=129392]
Westwind Weald
https://youtu.be/s-Ylo43tDJ8
164
Roughneck Camp
[npc=130424]
Waning Glacier
https://youtu.be/dx_nKNOOO_8
Id column is approximate quest № In Tiragarde Sound storyline (A Sound Plan <= for more info)