A package delivery system for use with an aircraft, the package delivery system comprising: a land vehicle equipped with a first processor operatively coupled with a first sensor package and a first communication transceiver, the first processor configured to navigate the land vehicle along a navigational land route based at least in part on data received via the first communication transceiver; a perception system arranged to be coupled to an aircraft, the perception system having a second sensor package operatively coupled with a second processor and a second communication transceiver; and a human-system interface device to communicate with the land vehicle and the perception system over one or more wireless links, wherein the HSI device, which is separate and apart from each of the land vehicle and the perception system, includes a third processor, a third communication transceiver, a user input device, and a display device, wherein the perception system is configured to transmit navigational commands to said land vehicle via said first communication transceiver based at least in part on data from the second sensor package, and wherein the HSI device is configured to transmit navigational commands to said land vehicle via said third communication transceiver and to receive from the land vehicle a video feed captured by the first sensor package; wherein the second sensor package includes a first optical payload, characterised in that the first optical payload is configured to generate terrain data for a geographic area when said aircraft, to which the perception system is coupled, is in an approach phase prior to said aircraft landing at a touchdown zone (304, 504) within the geographic area, wherein the second processor is configured to determine the navigational land route from the touchdown zone (304, 504) to a field operator based at least in part on the terrain data. a land vehicle equipped with a first processor operatively coupled with a first sensor package and a first communication transceiver, the first processor configured to navigate the land vehicle along a navigational land route based at least in part on data received via the first communication transceiver; a perception system arranged to be coupled to an aircraft, the perception system having a second sensor package operatively coupled with a second processor and a second communication transceiver; and a human-system interface device to communicate with the land vehicle and the perception system over one or more wireless links, wherein the HSI device, which is separate and apart from each of the land vehicle and the perception system, includes a third processor, a third communication transceiver, a user input device, and a display device, wherein the perception system is configured to transmit navigational commands to said land vehicle via said first communication transceiver based at least in part on data from the second sensor package, and wherein the HSI device is configured to transmit navigational commands to said land vehicle via said third communication transceiver and to receive from the land vehicle a video feed captured by the first sensor package; wherein the second sensor package includes a first optical payload, characterised in that the first optical payload is configured to generate terrain data for a geographic area when said aircraft, to which the perception system is coupled, is in an approach phase prior to said aircraft landing at a touchdown zone (304, 504) within the geographic area, wherein the second processor is configured to determine the navigational land route from the touchdown zone (304, 504) to a field operator based at least in part on the terrain data. wherein the perception system is configured to transmit navigational commands to said land vehicle via said first communication transceiver based at least in part on data from the second sensor package, and wherein the HSI device is configured to transmit navigational commands to said land vehicle via said third communication transceiver and to receive from the land vehicle a video feed captured by the first sensor package; wherein the second sensor package includes a first optical payload, characterised in that the first optical payload is configured to generate terrain data for a geographic area when said aircraft, to which the perception system is coupled, is in an approach phase prior to said aircraft landing at a touchdown zone (304, 504) within the geographic area, wherein the second processor is configured to determine the navigational land route from the touchdown zone (304, 504) to a field operator based at least in part on the terrain data.