Phebe N. Novakovic
Chairman and Chief Executive Officer at General Dynamics
Thanks, Jason. Now let me review the quarter in the context of the business segments, paying modest attention to the quarter-over-quarter sequential and annual comparisons that are rather straightforward and set out in the press release.
First, Aerospace. The story in Aerospace is sound in the sequential and Year-over-Year improvement, as well as the continuing strong demand for Gulfstream Aircraft, along with the overall strength of Gulfstream service business and the continuing improvement at Jet Aviation. In the quarter, Aerospace had revenue of $2.5 billion and earnings of $337 million. This represents a 4.4% increase in revenue and an 8% increase in earnings on a sequential basis. For the full year, revenue of $8.57 billion is up $432 million from the prior year, even though we delivered only one more aircraft than we did in 2021. The increase in both revenue and earnings was driven by higher service revenue at both Gulfstream and Jet Aviation. Earnings were also helped by somewhat higher margins on delivered aircraft.
Fourth quarter revenue and earnings comparison on a quarter-over-quarter basis aren't as attractive because three aircrafts we planned to deliver in the fourth quarter, slipped into the first quarter of this year. Gulfstream had 38 deliveries in the quarter, when we had planned to deliver 41. As a result, Aerospace revenue and earnings are somewhat less than anticipated by the sell side for the quarter and for the year, but generally consistent with our forecast. I should also point out that Aerospace margins improved consistently quarter-over-quarter throughout the year. Aerospace demand remained strong. The book-to-bill was 1.2 times in the quarter and 1.4 times at Gulfstream alone. Orders in the quarter were $3 billion, up from $2.7 billion in the third quarter, the Aerospace book-to-bill for the year was 1.5 times. To give you a little more color, Gulfstream received 430 new aircraft orders over the past two years, over 400 net orders after defaults and backlog adjustments as a result of the settlement of a case in arbitration. All said and done, aerospace backlog is up 20% in 2022 and a staggering 68% over the past two years.
As we go into the new year, the sales pipeline remains strong and sales activity is at a solid pace. At midyear 2022, we told you to expect revenue of about $8.6 billion and an operating margin of around 12.9%. We actually finished the year with a 13.2% operating margin. In short, we were spot on with respect to revenue and 30 basis points better on operating margin, which led to a $25 million more than forecast in operating earnings.
With respect to G700 development, we estimate it will certify this upcoming summer, but much depends on available FAA resources. So far, the FAA has been very collaborative and is proceeding according to plan with no surprises. In summary, aerospace exhibited very strong performance in the quarter and for the year. We look forward to a significant increase in deliveries in 2023 at Gulfstream and improved operating margin, but more about that as we get into guidance. We also expect continued growth and margin improvement at Jet.
Next, Combat Systems. After a relatively slow start to the year, Combat Systems finished with a powerful fourth quarter. In fact, the fourth quarter of 2022 proved the highest revenue and earnings for Combat Systems in over 10 years. Revenue in the quarter was $2.18 billion, and it's up 15.5% from the year ago quarter. Operating earnings of $332 million are up 18.1% on a 30 basis point increase in operating margin. OTS alone captured more than one third of its revenue and earnings in the fourth quarter. The revenue growth was largely driven by Mobile Protected Firepower, Abrams for Poland and the large international order in Canada. OTS enjoyed higher revenue across all lines of business with particular strength in artillery rounds.
Not surprising, the sequential comparisons are even better. Revenue was up $391 million or 21.9% and earnings are up $61 million or 22.5% on the strength of a 15.2% operating margin. From an orders perspective, Combat had a very good year in 2022 with a book-to-bill of 1.1 times, driven by MPS, very strong international demand for the Abrams main battle tank as well as growing demand on the munition side of the business. By the way, Combat's annual performance is fairly consistent with the forecast we provided you earlier in the year. Revenue and operating earnings are up somewhat and operating margin is a little lower. In short, this group had a wonderful quarter, continued its history of strong margin performance and had good order activity and a strong pipeline of opportunity as we go forward.
Marine Systems. The Marine Systems growth story continues. Fourth quarter revenue of $2,970 billion is up 3.4% over the year ago quarter. Revenue was also up 7.2% sequentially and 4.9% for the full year. Operating earnings are up about 1% over the year ago, off less than 0.5% sequentially and up 2.6% for the full year. Once again, this is the highest full year of revenue and earnings ever for the Marine group. A little perspective maybe of assistance here. Marine Systems has grown revenue from $8 billion in 2017 to $11 billion in 2022, this is a 5.3% compound annual growth rate with an average increase of $600 million per year. Earnings have grown from $685 million in 2017 to $900 million in 2022, a 5.5% compound annual growth rate.
In addition, Marine had strong orders in the quarter, generating a 2.2 times book-to-bill, including the receipt of a $5.1 billion contract modification to Colombia. Our forecast to you in July of last year anticipated revenue of about $10.8 billion, operating margin of 8.3% and operating earnings of $896 million. We came in above that for revenue, a little lower on the predicted operating margin and right on the forecasted earnings.
So Jason is going to give you a little color on the Technologies group, his new responsibility, provide a bit of perspective on balance sheet, other income and expense items, and I will close with our outlook for 2023.