▁P avel ▁Sen ko ▁▁ 1 9 7 3 – 1 9 7 5 ▁– ▁ 1 9 th ▁Soviet ▁Ant ar ctic ▁Ex ped ition ▁– ▁led ▁by ▁D . ▁M aks ut ov , ▁V . ▁Ign at ov ▁▁ 1 9 7 4 – 1 9 7 6 ▁– ▁ 2 0 th ▁Soviet ▁Ant ar ctic ▁Ex ped ition ▁– ▁led ▁by ▁V . ▁Ser dy uk ov , ▁N . ▁K orn il ov ▁▁ 1 9 7 5 – 1 9 7 7 ▁– ▁ 2 1 st ▁Soviet ▁Ant ar ctic ▁Ex ped ition ▁– ▁led ▁by ▁O . ▁Sed ov , ▁G . ▁B ardin ▁▁ 1 9 7 6 – 1 9 7 8 ▁– ▁ 2 2 nd ▁Soviet ▁Ant ar ctic ▁Ex ped ition ▁– ▁led ▁by ▁N . ▁Ty ab in , ▁Leon id ▁Dub ro vin ▁▁ 1 9 7 7 – 1 9 7 9 ▁– ▁ 2 3 rd ▁Soviet ▁Ant ar ctic ▁Ex ped ition ▁– ▁led ▁by ▁V . ▁Ser dy uk ov , ▁O . ▁Sed ov ▁▁ 1 9 7 8 – 1 9 8 0 ▁– ▁ 2 4 th ▁Soviet ▁Ant ar ctic ▁Ex ped ition ▁– ▁led ▁by ▁A . ▁Ar tem ye v , ▁O . ▁Sed ov ▁▁ 1 9 7 9 ▁– ▁Air ▁New ▁Zealand ▁Fl ight ▁ 9 0 1 ▁– ▁air plane ▁crash ▁▁ 1 9 7 9 – 1 9 8 0 ▁– ▁ 2