Nuclear-armed ICBMs do not have a terminal dive maneuver. Not needed for any reason. Fuzing is accomplished by altimeter. The guidance system is designed to result in a target dispersion error well within the blast radius of the weapon. (It's a tradeoff between accuracy and weapon yield. My old motto: "When in doubt, add more yield.")
However, if you are using a conventional warhead, you are far more sensitive to target dispersion errors and need to reduce them as much as possible. This leads to a vertical terminal maneuver, as it nullifies any lateral error resulting from projection of a height error. This is used in conventional guided bombs of the JDAM variety. It may be that this "Oreshnik" missile has such a terminal maneuver, especially if it has a terrain-recognition seeker.
Nuclear-armed ICBMs do not have a terminal dive maneuver. Not needed for any reason. Fuzing is accomplished by altimeter. The guidance system is designed to result in a target dispersion error well within the blast radius of the weapon. (It's a tradeoff between accuracy and weapon yield. My old motto: "When in doubt, add more yield.")
However, if you are using a conventional warhead, you are far more sensitive to target dispersion errors and need to reduce them as much as possible. This leads to a vertical terminal maneuver, as it nullifies any lateral error resulting from projection of a height error. This is used in conventional guided bombs of the JDAM variety. It may be that this "Oreshnik" missile has such a terminal maneuver, especially if it has a terrain-recognition seeker.