JALANETHRA e-SERVICE PORTAL - All services provided by Hydrographic Survey Wing are available through JALANETHRA e-service portal
https://jalanethra.hsw.kerala.gov.in/
Locate us
Office of The Chief Hydrographer
Hydrographic Survey Wing,
Aryankuzhi road,
Kamaleswaram.
Manacaud.P.O
Thiruvananthapuram - 695 009