Robotics revenues increased $11.2 million, or 16%, during the second quarter 2024 compared to the second quarter 2023 primarily due to higher chartered vessel days and trenching and ROV activities during the current year. Chartered vessel activity increased to 528 days, or 97%, during the second quarter 2024 compared to 435 days and 96%, during the second quarter 2023. ROV and trencher utilization increased to 76% during the second quarter 2024 compared to 58% during the second quarter 2023. The second quarter 2024 included 232 days of integrated vessel trenching compared to 194 days during the second quarter 2023. Robotics operating income increased $10.9 million during the second quarter 2024 compared to the second quarter 2023 primarily due to higher revenues and higher profit margins during the second quarter 2024.
Shallow Water Abandonment
Shallow Water Abandonment revenues increased $24.0 million, or 89%, during the second quarter 2024 compared to the previous quarter. The increase in revenues reflected the seasonally higher activity levels on the Gulf of Mexico shelf. Overall vessel utilization increased to 58% during the second quarter 2024 compared to 41% during the prior quarter. Plug and Abandonment and Coiled Tubing systems achieved 632 days utilization, or 27%, during the second quarter 2024 compared to 626 days utilization, or 26%, during the prior quarter. The Epic Hedron heavy lift barge had 46% utilization during the second quarter 2024 compared to being idle during the prior quarter. Shallow Water Abandonment generated an operating loss of $0.3 million during the second quarter 2024, an improvement of $12.1 million compared to the prior quarter primarily due to higher revenues during the second quarter 2024.
Shallow Water Abandonment revenues decreased $25.5 million, or 33%, during the second quarter 2024 compared to the second quarter 2023. The decrease in revenues was due to lower activity levels and an overall softer Gulf of Mexico shelf market in 2024 resulting in lower vessel and system utilization during the second quarter 2024 compared to the second quarter 2023. Overall vessel utilization was 58% during the second quarter 2024 compared to 78% during the second quarter 2023. Plug and Abandonment and Coiled Tubing systems achieved 632 days utilization, or 27% on 26 systems, during the second quarter 2024 compared to 1,554 days utilization, or 81% on 21 systems, during the second quarter 2023. The Epic Hedron heavy lift barge had 46% utilization during the second quarter 2024 undergoing an approximate three-week regulatory certification period compared to having 79% utilization during the second quarter 2023. Shallow Water Abandonment operating income decreased $20.0 million during the second quarter 2024 compared to the second quarter 2023 primarily due to lower revenues during the second quarter 2024.
Production Facilities
Production Facilities revenues increased $1.2 million, or 5%, during the second quarter 2024 compared to the prior quarter primarily due to higher oil and gas production and prices. Production Facilities generated operating income of $9.1 million during the second quarter 2024 compared to losses of $1.5 million during the prior quarter primarily due to workover costs on the Thunder Hawk wells of approximately $8.6 million incurred during the prior quarter and higher revenues quarter over quarter.
Production Facilities revenues increased $2.3 million, or 10%, during the second quarter 2024 compared to the second quarter 2023 primarily due to higher oil and gas production during the second quarter 2024 due to both fields being shut-in for maintenance during portions of the second quarter 2023. Production Facilities operating income increased $1.3 million during the second quarter 2024 compared to the second quarter 2023 primarily due higher revenues during the second quarter 2024.
Selling, General and Administrative and Other
Share Repurchases
Share repurchases totaled approximately 0.5 million shares for $5.2 million during the second quarter 2024.
Selling, General and Administrative
Selling, general and administrative expenses were $22.3 million, or 6.1% of revenue, during the second quarter 2024 compared to $21.0 million, or 7.0% of revenue, during the prior quarter. The increase in expenses during the second quarter 2024 was primarily due to higher compensation costs compared to the prior quarter.
Other Income and Expenses
Other expense, net was $0.4 million during the second quarter 2024 compared to $2.2 million during the prior quarter. Other expense, net during the first quarter 2024 primarily included foreign currency losses related to the approximate 1% depreciation of the British pound on U.S. dollar denominated intercompany debt in our U.K. entities. The change in the British pound exchange rate during the second quarter 2024 was inconsequential.