Del. Code tit. 2 § 907
Where necessary, in order to provide unobstructed air space for the landing and taking off of aircraft utilizing airports or restricted landing areas acquired or operated under the provisions of this chapter, every political subdivision may acquire, in the same manner as is provided for the acquisition of property for airport purposes, easements through or other interests in air spaces over land or water, interests in airport hazards outside the boundaries of the airports or restricted landing areas and such other airport protection privileges as are necessary to insure safe approaches to the landing areas of the airports or restricted landing areas and the safe and efficient operation thereof. Every political subdivision may also acquire, in the same manner, the right or easement, for a term of years or perpetually, to place or maintain suitable marks for the daytime marking and suitable lights for the nighttime marking of airport hazards, including the right of ingress and egress to or from such airport hazards, for the purpose of maintaining and repairing such lights and marks. This authority shall not be so construed as to limit any right, power or authority to zone property adjacent to airports and restricted landing areas under any laws of this State.
2 Del. C. § 907