A method of obtaining real-time data relating to a well construction activity, the method comprising the steps of: mounting a magnetic field generating device and fluid pressure pulse generating device to a tubing string ; releasably coupling the tubing string to wellbore-lining tubing comprising at least one non-magnetic tubing section ; running the wellbore-lining tubing and the devices into the wellbore using the tubing string ; positioning the wellbore-lining tubing in the wellbore; releasing the tubing string from the wellbore-lining tubing ; measuring at least one downhole parameter at a location external of the wellbore-lining tubing using at least one sensor associated with the non-magnetic tubing section ; positioning the magnetic field generating device within the non-magnetic tubing section , further comprising anchoring the wellbore-lining tubing in the wellbore prior to releasing the tubing string activating the device to inductively couple the device to the at least one sensor 40; transmitting data relating to the at least one measured parameter through the non-magnetic tubing section to the magnetic field generating device by means of the inductive coupling; and transmitting the data retrieved from the at least one sensor 40 to surface using the fluid pressure pulse generating device associated with the magnetic field generating device , further comprising positioning the magnetic field generating device outside of the non-magnetic tubing section during run-into the wellbore; and, following release of the tubing string from the wellbore-lining tubing , translating the magnetic field generating device relative to the wellbore-lining tubing from the position outside the non-magnetic tubing section to the position within the non-magnetic tubing section . mounting a magnetic field generating device and fluid pressure pulse generating device to a tubing string ; releasably coupling the tubing string to wellbore-lining tubing comprising at least one non-magnetic tubing section ; running the wellbore-lining tubing and the devices into the wellbore using the tubing string ; positioning the wellbore-lining tubing in the wellbore; releasing the tubing string from the wellbore-lining tubing ; measuring at least one downhole parameter at a location external of the wellbore-lining tubing using at least one sensor associated with the non-magnetic tubing section ; positioning the magnetic field generating device within the non-magnetic tubing section , further comprising anchoring the wellbore-lining tubing in the wellbore prior to releasing the tubing string activating the device to inductively couple the device to the at least one sensor 40; transmitting data relating to the at least one measured parameter through the non-magnetic tubing section to the magnetic field generating device by means of the inductive coupling; and transmitting the data retrieved from the at least one sensor 40 to surface using the fluid pressure pulse generating device associated with the magnetic field generating device , further comprising positioning the magnetic field generating device outside of the non-magnetic tubing section during run-into the wellbore; and, following release of the tubing string from the wellbore-lining tubing , translating the magnetic field generating device relative to the wellbore-lining tubing from the position outside the non-magnetic tubing section to the position within the non-magnetic tubing section . <EOS>