帆綱 is read as ほづな (hozuna) and means halyard.
ほづな
hozuna
ほぶね
sailing ship
はんそう
sailing
ほ
sail
ほまえせん
sailboat
よこづな
yokozuna (highest rank in sumo)
つな
grand champion's braided belt
たづな
control
たいこう
fundamental principles
ようこう
main principle
いのちづな
lifeline
せいじようこう
platform (e.g. of a party)
ぼうえいけいかくのたいこう
National Defense Program Outline