Comparison of transition data of the current study with the values from other work. Panel a: comparison of theoretical transition probabilities, A, in both Babushkin (B) and Coulomb (C) gauge with the results available in the NIST-ASD (Kramida et al. 2022). Panel b: comparison of the log(gf) values in Babushkin form with the results from CIV3 (Hibbert et al. 1991), MCHF (Tachiev & Froese Fischer 2002) and B-spline R-matrix (Tayal 2009) calculations. Panel c: comparison of the theoretical line strengths, S_MCDHF, with the corresponding experimental results published by Golly et al. (2003, in red square) and Bacławski (2008, in blue circle). Note: Relative line strengths were provided by Bacławski (2008), which means that the line strengths are normalised within each multiplet to the sum of 100; the corresponding results from present calculations and Golly et al. (2003) were done with the same procedure. The line strengths in Babushkin gauge were used for the comparison.