Vessel Operating Expenses. Vessel operating expenses were $14.9 million for the three months ended March 31, 2024, consistent with $14.9 million for the three months ended March 31, 2023.
Charter Hire Costs. Total charter hire expenses were $5.4 million for the three months ended March 31, 2024, generally consistent with $5.5 million for the three months ended March 31, 2023. Total charter hire expenses in the first quarter of 2024 were comprised of an operating expense component of $2.8 million and a vessel lease expense component of $2.6 million, consistent with the first quarter of 2023.
Depreciation. Depreciation expense for the three months ended March 31, 2024 was $7.0 million, generally consistent with $6.9 million for the three months ended March 31, 2023.
Amortization of Deferred Drydock Expenditures. Amortization of deferred drydock expenditures for the three months ended March 31, 2024 was $0.8 million, a decrease of $0.2 million from $1.0 million for the three months ended March 31, 2023. The deferred costs of drydockings for a given vessel are amortized on a straight-line basis to the next scheduled drydocking of the vessel.
General and Administrative Expenses: Corporate. Corporate-related general and administrative expenses for the three months ended March 31, 2024 were $5.1 million, consistent with $5.1 million for the three months ended March 31, 2023.
General and Administrative Expenses: Commercial and Chartering. Commercial and chartering expenses are the expenses attributable to our chartering and commercial operations departments in connection with our spot trading activities. Commercial and chartering expenses for the three months ended March 31, 2024 were $1.1 million, generally consistent with $1.2 million for the three months ended March 31, 2023.
Interest Expense and Finance Costs. Interest expense and finance costs for the three months ended March 31, 2024 were $2.5 million, a decrease of $0.4 million from $2.9 million for the three months ended March 31, 2023. The decrease in costs was primarily due to the conversion of our term loan into a fully revolving facility, with 50% of the term loan being converted to a revolving facility during the three months ended June 30, 2023, and the remaining 50% being converted during the three months ended March 31, 2024. The flexibility of our revolving facilities, with only $23.1 million drawn down as of March 31, 2024, has minimized the impact of the elevated interest rate environment. Amortization of deferred finance fees for the three months ended March 31, 2024 was $0.3 million, consistent with $0.3 million for the three months ended March 31, 2023.
LIQUIDITY AND CAPITAL RESOURCES
Our primary sources of liquidity are cash and cash equivalents, cash flows provided by our operations, our undrawn credit facilities and capital raised through financing transactions. As of March 31, 2024, we had $285.3 million in liquidity available with cash and cash equivalents of $48.6 million (December 31, 2023: $46.8 million) and amounts available and undrawn under our revolving credit facilities of $236.7 million (December 31, 2023: $221.2 million). In April 2024, we paid $34.4 million for the purchase of the Ardmore Gibraltar, in addition to $8.4 million which we previously paid as a deposit. In April 2024, we received $27.1 million for the sale of the Ardmore Seafarer. In June 2024, we intend to pay $41.0 million to complete the purchases of the Ardmore Seawolf and Ardmore Seahawk tankers, which are currently under sale-leaseback arrangements and for which we exercised purchase options in February 2024. We believe that our working capital, together with expected cash flows from operations, will be sufficient for our present requirements.
Our short-term liquidity requirements include the payment of operating expenses (including voyage expenses and bunkers from spot chartering our vessels), drydocking expenditures, debt servicing costs, lease payments, quarterly preferred and common stock cash dividends, interest rate swap settlements, scheduled repayments of long-term debt, as well as funding our other working capital requirements. Our short-term and spot charters contribute to the volatility of our net operating cash flows, and thus our ability to generate sufficient cash flows to meet our short-term liquidity needs. Historically, the tanker industry has been cyclical, experiencing volatility in profitability and asset values resulting from changes in the supply of, and demand for, vessel capacity. In addition, tanker spot markets historically have exhibited seasonal variations in charter rates. Tanker spot markets are typically stronger in the winter months as a result of increased oil consumption in the northern hemisphere and unpredictable weather patterns that tend to disrupt vessel scheduling.